Why don't you guys do a custom natami demo to show off the systems capabilities then? You can use 16 bit sound and some ridiculous 3d graphics. Much in the style of old school amiga demos, but with better sound, richer graphics and smoother animations due to increased processor capability. If you really want to push the system and show it off right, a custom programmed demo would be best.
EDIT : I agree with franko, if people are just interested in quake, they can play that on any crap pc...
Steven