Microsoft's Adaptive Touchscreen Keyboard
ramandeeps noted a Microsoft research project on an adaptive keyboard that is essentially a touchscreen that updates to make it easier to keep complex keybindings to a minimum. This is part of the 2010 Student Innovation Contest, so if you want one and happen to be a student, you can sign up to do research on the device.
The goal of the contest is to develop new interactions on unique hardware that you cannot get anywhere else. We supply you with the special hardware and you show us how innovative you can be with it. ...
To reserve a place in the contest and to receive an Adaptive keyboard for development, contestants must submit an entry email to the contest chair no later than August 17th, 2010.
You also have to return the keyboard by October, so it's not yours forever. http://www.acm.org/uist/uist2010/Student_Contest.html
Kind of like that, except with transparent mechanical keys sitting on top.