BT developing Motion Control Laptop

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Just saw an interesting post that BT was developing a motion control laptop/tablet pcs. The user can move the device back and forth and control the cursor. The release says

This revolutionary piece of technology is in the development stages, but is already being tested by engineers who are trying to find situations where this sort of control would be invaluable, this would include engineers, etc.

Am still trying to figure out where this would be useful. It is targeted for people who have so many things to do, they can use only one hand. Not very commonplace. Will keep an eye on this to see how it evolves.