Why haven't computers taken off in the kitchen? My guess is that it's a question of utility and mess. There's not that much we want to do with a computer in the kitchen (and what we do want can usually be handled by cheap index cards). Even if the computer was a good solution to some kitchen problem, it would have to be built in such a specialised way that it could only be sold to that niche market, which reduces demand, which raises costs and so on.
Mokalus of Borg
PS - Of course, similar arguments could be made about computers in cars.
PPS - And every year, those arguments get weaker.