Doesn't the next generation of controller simply work over bluetooth? I know the DS3 already does. If that's the case, it shouldn't require any specialized hardware, since almost everything comes with bluetooth these days.
That doesn't surprise me, the GamePad in particular seems like something that bluetooth wasn't really designed for. Does it even have the bandwidth to push video? It's pretty power-hungry when 100% active too.
I think they're actually using a variant of 802.11n on the 5 GHz band for the Wii U GamePad, probably because it's the cheapest option that has enough bandwidth.
