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Optimus Tactus, Art Lebedev
The Optimus Tactus was the keyboard that Maximus Meridius used in the movie Gladiator.  Ok, maybe not, but it sounds like he should have.
I guess if you’re going to use a touch screen keyboard this would be it.  Oh, except for the fact that it’s only a concept at the moment.  According to the Art Lebedev Studio, here’s the plan: any part of the keyboard surface can be programmed to perform any function or display any image.  Optimus Tactus does not have physical keys, which means there are no restrictions on their shape or size.  As per the image above, there is a video mode as well as a typing mode (shown below). 
Initially this keyboard could prove costly to the consumer, considering it’s a full length touch-display.  The big question is, would you really use it?  There’s no question that it’s uber cool and could be extremely useful on specialized tasks, but I’m not sure I’d like typing on a smooth surface; my fingers need a little somethin-somethin to know their doing a good job. 
By the time this thing gets to market, Apple will probably have created a shape-morphing tactile multi-display video membrane touch screen, that walks the dog on it’s spare time; or they’ll at least have the patent for one.

Optimus Tactus, Art Levedev Studio, Typing Mode