The patent also describes a controller with a screen, much like Nintendo's current Wii U GamePad controller. Whether or not this is indicative of backwards compatibility with digital Wii U titles is unknown at this point. Based on past history, though, there's probably a pretty good chance of it.
Despite these intriguing new bits of information, very little is still known about Nintendo's next foray into the console business. The only other facts that Nintendo has disclosed about the device is that it is currently code-named "NX", and that more information about it won't be forthcoming until sometime next year. Until then, this will all continue to (mainly) be a speculation game.