Twin-screen tablet (back-to-back)?

I may not be reading your post as you intended. I'm keying on the phrase "did video stream ok" and your comment on relative cost.

If your intention is for two observers to see identical views, would two tablets running identical programs with identical input satisfy the requirements. I don't know enough about Android to determine effort require. But intercepting input to "master" before acting on it and then transmitting only that information to the "slave" may reduce bandwidth requirements enough to justify effort to modify the software. More information on "what" you wish to accomplish rather than "how" could be useful.

Have you thought it through? If you held it at a good viewing angle for you, it would be aimed at the feet of the other people (or vice-versa) and your hand would be obscuring part of their view ...

Please share what program you want to see on both tablets.

If the program can be a web browser, making one tablet a server, then both can view the same page over wifi.

hamilton

PS: Sounds like a sales gimmick to me.

The bottom line of course is that it may not be a WiFi problem at all...I stream video throughout my entire home, from an NAS box, including to an SGII Captivate without problems. Thus WiFi speeds, served over a LAN based network, should not be a problem for anyone these days if using 802.11n/ or 802.11ac based router.

So, not having any specific info on your hardware/ video/ and software combo, it's rather difficult to know where the bottleneck lies.

1) Can you stream/ display 1080p video from YouTube, NetFlix, Hulu, NBC, ABC, or any other source, to your tablet without issue? If you can, then WiFi over LAN is not the issue, nor is your hardware. 2) Tunneling into a home based network from outside your own LAN will never give you the bandwidth necessary to serve high res video without problems, regardless of how good your hardware is. Typical upload speeds for consumer based internet access points are far too low in bandwidth to support such a capability.

Cloud based services are actually your best shot at streaming high res video across WAN. You really should consider a commercial service with higher upload speeds available to your server.

3) The best solution to part of your quest is indeed a dual monitor configuration of some sort, as I personally know of no dual-faced display hardware device available for your purpose.

This would incur additional hardware resources and expense to handle streaming traffic, decode, and output to HDMI and/ or splitter -> monitor(s). Feasibly one could take most any WiFi extender, laptop, or full USB tablet and create a singular access point from which to connect multiple displays. There are indeed tablets available on the market today that do fully support USB, and added Bluetooth services, limited only by the scope of the current operating system in use. Feature sets do vary dramatically by both vendor and price...

4) Serving network streams via WiFi would easily and cheaply satisfy most of your requirements, but the streams would not be in-sync with each other regardless of all other factors. Propagation delays may or may not be problematic...not sure if that really matters. 4) Added notes on hardware: An Arm v7 1GHz Dual Core processor, for example, is actually not fast enough for full high res video streaming, factoring in display capability, native screen resolution and a host of other factors including optimized codecs, and player. So, depending upon your own hardware capability, you might need to consider converting native video sources to a much more mobile device friendly format. This assumes of course one is willing to spend the added time necessary to pre-process the video content.

Although I'm quite sure this is not really an answer to your current dilemma, perhaps something said will prove helpful...

Asus Taichi:

It does however run Windows 8 and is probably more than you want to pay...

Theo

You want what Amazon was noising about not quite a year ago:

: Amazon is working on a dual-display Kindle tablet : :

But I don't think they're there yet with their hardware. HTH. -- tlvp

router??? if you're using the internet you're definately doing it wrong!

Put the hotspot inside the tablet, it's just software. drastically reduced range should reduce power consumption too.

should be possible if the tablet has a USB on-the-go port, dunno what softwre would be needed for the tablet to emulate a usb display device.

how good do you need the video to be on yuor side?

While looking for something else, I noticed

Relevant/useful?

Not exactly - what I want is to use the tablet for video instruction in a phys-ed program. A slave screen - glued to the back of the tablet, connected to the hdmi out of the tablet (and the tablet set to oupt on both its internal screen and the hdmi port) - would work exactly right. The cheapest such hdmi screen is bigger and more costly than a cheap tablet.

And the relative height of the instructor (me) and the student(s) is such that back-to-back screens are fine for viewing angle.

I use this:

RAVPower RP-WD01 Wireless WiFi-Disk & Built-in 3000mAh Li-Polymer Battery

You can find it at Amazon and Newegg, just search for RavPower Wifi Disk.

Turn it on and plug in your external memory device: SD card, flash drive, even a portable hard drive. It creates its own wifi network and will stream the content from the memory device to up to five individual devices. All you have to do is install the app onto each device, then log into the disk's wifi network and choose the content you wish to stream. It can stream content up to five hours off its built-in battery. It's an incredibly handy device, just a little smaller and thinner than the typical portable hard drive.

Cheap, too. It's currently going for $50, but Newegg occasionally has it for $40.