I think there would have to be a lot they would have to do to make that possible. Many of the menus and apps are only accessible with the Wii U Game Pad, and while say you can use YouTube with your smart phone, that's about the extent of what you could do without the tablet controller. I almost always use the Pro controller when playing games, however when I had to wait a week because I needed to replace the battery in it, it cut down the functionality of the console by like, 70%. You also have to keep in mind that it wouldn't just be on Nintendo's end either. You would need every company who made every game to release a patch to make the games playable with the pro controller that aren't already. For example, you can play the LEGO games with the pro controller but to get into the game you need the game pad. Stupid, I know, but it would take a lot to make the game pad not a necessity to own the console.