I wish there was a way to run the Dolphin emulator through the WiiU console. Skyward Sword looks beautiful.
I have a thing for going disc-free if at all possible (including on PC before Steam or GOG were actually a thing), and I put USB Launcher on my Wii with rips of all of my GameCube and Wii games. If I had a Wii U, I would move all my old ripped games to it on day one.