Well we're already embedding RFIDs in people, so chips with limited radio potential and some rudimentary processing power are a done deal.
The question becomes how these embedded processors will change over time. I don't think it's too unreasonable to imagine the memristor tech being used and adoption rates going up. The neural interface, of course, was extremely speculative. But the rest of it seems trivial. At least to me.
I think that's more than just a little while off, that sort of enhancement, if it ever comes to pass.
Ok, finally found it, posted it here: http://news.ycombinator.com/item?id=1322135