But I think it will be a while, at least for the phones. Just about all cell phones have bluetooth, but I have yet to see one besides the iPhone with wifi.
Also, with phones, bluetooth makes a bit more sense to me, as it seems that (I could be wrong) bluetooth would use less power than wifi, why else its more limited range?
What excites me about this is something I've thought about for a while and mentioned once or twice here -- peer to peer telephony. If it got big enough we could put the cell companies out of business.