#1374: HalfLight

It may be mostly cosmetic, but today’s invention is a computer keyboard with keys that glow when pressed.

The colour of the light emitted might vary with the speed of key depression.

The keys would then dim exponentially, with a user-defined time constant, so that the computer owner gradually learns the visual-temporal pattern associated with typing a given word, say, and will thus be better equipped to spot spelling errors in realtime (especially in irritating passwords).