For me the Wii U is first and foremost an HDMI Gamecube, Wii, and Wii U machine. I mean yeah, you need the GC controller adapter, but native playback of any game from all three of those systems out of one box is why you should get one. The emulation capability with all those legacy/retro systems is a nice bonus, and you can be sure that's all available on my Wii U, but tbh I don't really use it.