It could have uses on computer kiosks and the like - but looks a bit fragile for letting the public loose on them.
It does give me an idea for a configurable morphing keyboard though (i.e. you can define the layout and size of the keys, and what each key 'shows' on the surface e.g. the letter A or Ctrl etc - and could be adapted to any language character set.
The keys themselves would be formed from lots of little rods which can be raised or lowered depending on the config, and would allow you to 'press' the group of rods like you would press a key. Each rod would have a lcd or led on the end which can change colour - so that you can have a background colour and some text on the key itself.
Next stop, Dragon's Den!