for
full
version is
Just get the HD DVD reader for the XBox 360, which is USB, and use that, and you can then watch HD DVDs. Standard DVDs show how low res they are, even on laptop screens.
I think the reader mentioned is only $199.00
To watch an HD DVD in full resolution, however, you will need to be running Vista, or a good Linux Distro, and have the aacs key in hand (in da box, actually).