Nintendo uses a proprietary connection for the Wii U GamePad as well.

sliverstorm · on Sept 25, 2013

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.

makomk · on Sept 26, 2013

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.