Toyota develops thought-controlled wheelchair (be sure to check the video)

I think that the idea here is to provide something that has a fairly high barrier before 'recognition' takes place.

From the demo video I think you can gather that it takes a while to hold a thought 'steady' before the system responds.

That is probably why the wheelchair moves slowly at the cornering points.

A guy I once met was partially blind. He decided to learn how to see again as he was sick of feeling his way around. He took the "evolutionary" option, by starting to walk extremely fast everywhere. For the first few weeks he had a few knocks and bruises as he ran into doors. Gradually he got back his ability to detect objects at high speed.

I think our brain can adapt much better than we realise with the right stimuli :)