This is neat and I have some older systems (like the Transmeta based Gateway Connected Touch Pad) that I'd like to get back up and running and there are some good ideas in there. However, calling a 486sx "ancient" is a bit of a stretch... (my oldest working computer is from 1981 and that's far from ancient).
By "this thing", you mean the GCT? Googling for "Gateway Connected Touchpad" and looking at images brings up ~ 8 images. My "other thing" is a Nascom 2.
(The GCT would be a lot more appealing if the LCD display was better, but it's DSTN and pretty horrible compared to modern displays).