OK, this is a little too much intrusion of science fiction into daily life: a bike that allegedly shifts in response to your brainwaves (HT: The Infrastructurist).
Now I know why so few people bike: it's just too hard to decide when to jump up or down a cog. Although I'm not sure a mind-reading bike really solves that particular problem, since you still have to decide to shift, though it says it can also remember previous shifts by location, and then shift again at the same place, say downshifting before you hit a hill. No indication if it takes a wind reading before doing so.
This is kind of fun, if creepy, but it's really a solution in search of a problem. If the problem is the intellectual demands of shifting, it should measure muscular effort and cadence, and shift to maintain constant pace and effort. Your mind shouldn't really have much to do with it.
Or it could measure sweat (maintaining an effort that keeps you from getting to the office soaked in sweat) or passerby perception (if someone attractive is watching you, you'd like to be showing some real speed and form). There are lots of possibilities.
Or you can get a fixie, like I have, and just follow its cruel dictates.