Mark Weisers world and the world of hacking have fairly little overlap, the RasPi is solidly in the hacking camp for now. I don't expect consumers to buy RasPi's anymore than I expect them to buy 1U servers or the racks to mount those in.
Processing power available to the masses is intimately connected to mobile phones and tabs. RasPi's are only one small step removed from a girl or a guy wielding a soldering iron.