I'm confused when people talk about third party support, whether they mean exclusives or just getting what the other guys get.
Wii U should get everything the PS3/360/PC get, no? and when Durango/Orbis come around, there's still the Vita, 3DS, and hell, iOS. I'd imagine if Wii had been as powerful as 360/PS3, it too would have had third party support. These days is just makes sense to put your game on wherever you can.
I mean, personally I don't care. I have a PC and both current gen consoles. When I get a Wii U, it will be for Nintendo games. The when just depends on the price; maybe $200 or something.
How much do consoles even cost these days? last one I bought was a replacement arcade 360 for $100 on sale, back in 2009.