The Register has a blurb about simPC, an "idiot-proof" PC set to debut in May of this year. It seems like a step towards a thin-client world, though it is aimed primarily at the elderly. For about $400 for the box and a $13-per-month subscription, users get a box with a propietary OS and software preinstalled for online banking, spam filtering, virus detection and online storage.
See it
here