Sinclair has done it, their latest ZX81 has it all and then some:
After the Consumer Electronics Show in Las Vegas this January, it looked like 2011 would be the Year of the Tablet. But not everyone wants to flick around a screen with their fingertips. If you fit into this category, the new ZX81 from the UK's Sinclair Research could be just the panacea you're looking for.
I believe it's a joke. (Although when I first looked, I didn't realize that black space wasn't a screen, but then, watching the video, I realized it was humor--or, since I think it's British, humour. )