Mario Kart’s latest installment has been announced, Mario Kart 8. It will be coming in Spring 2014 and will be released on the Wii U.
It is a pretty good match up to what you would expect from a casual racing game, but there  is a new formula added to it. Mario Kart 8 courses will now have a 3D aspect to it, which will let you “defy gravity”, as per Iwata-san on the Nintendo Direct this morning.
Just like Mario Kart 7 you will be able to race by air gliding and underwater, but you can also ride motorcycles just like in Mario Kart Wii.