8 Core? A bump upwards for the RAM? SATA?
I'm thinking with a few more cores even at the same spec, and another
couple GBs of RAM, I could truly replace most of my desktop computer
needs with such a Pi. SATA for bonus points, but I can live with only
USB HDs. Right now if I launch Chromium, for example, open a bunch of
tabs, I quickly get into trouble with slowness, and crashing.
Maybe as a Pi Pro adjunct to the current Pi? Still cheap and as moddable
as can be, but maybe $20 more for the above?
Perhaps three lines of Pi computers: Current Zero for minimal computing
power needs, standard Pi (current Pi 3) that's great for almost any
project needing a wee bit more power, and a Pi Pro for the cheapest
possible fully useful desktop that still has all the rest of what makes
Pis so fun and useful.
If you're not part of the solution, you're part of the precipitate.
Part of what makes it useful is you don't particularly care if you blow
it up, and if you screw up the configuration you can just write a
fresh SD card - neither of those is compatible with a general purpose
PC replacement. Also a more powerful board is going to need more than a
standard 5V 2A PSU, and probably more than the current passive cooling.
The main bugbear seems to be the boot process from the SD card.
Apparently the beaglebone can be booted using free software (Das U-Boot)
whereas the Pi SD boot software is closed source. I haven't got a
beaglebone so I can't really help there.
3D acceleration is not an issue because, as you say, Minix is purely
educational and doesn't need it.