Re: They have to be joking
The 3D apps that I've used have tended to make heavy use of modifier keys (like Ctrl or Shift) with the mouse and pretty much every app (even ones geared mostly at consumption like video players) use the keyboard from time to time. Virtual keyboards on touch-screen devices are pretty ropey -- those operated by Wii-mote are even more so. All in all, I'm not holding my breath. I think this has a very limited number of real-world uses.