Besides the obvious (usb loaders, emulators, cheat codes (for single player games, don't get your panties in a twist)) I'd like it if there was some sort of homebrew hack to allow you to use a PS3 controller as a Wii U Pro Controller in Wii U games, similar to how you can use it for GC games in Devolution. The Pro Controller is nice and all, but I still prefer a DualShock3 to it.