I was watching a video earlier from Karting All Day and they spotted a CPU doing this during the treehouse footage for Mario Kart World. We've yet to see people utilizing all the new parkour mechanics. We've seen so much tech but we're still barely skimming the surface.
Reggie had to convince Miyamoto and Nintendo to include Wii Sports as a free pack in game for the Wii. According to his book, Reggie said Nintendo simply doesn’t believe they should give away their hard work for free. But they relented for the Wii because it was such a new concept.
It also seems like the pro controller, which they haven't showed yet, will be able to be split in half to also take advantage of the mouse functionality.