We already knew it was 720p noAA with poor textures and low poly geometry (like since one year ago...). It's technically Mario Kart Wii at 720p. If only it was at least that!
Because it's worse! The real surprise (bad) except the 30fps animation for local multiplayer is the constant 59fps in single mode. A constant micro-stuttering during avery AI encounters. Apparently it has judder only during CPU encounters.
The interesting theory is that every 64 frames, the game does nothing except compute the next future second of behaviour of the CPU players; CPU too weak to even compute AI players in MK8?
Technically, the game is really far away from X360 Forza 4 and PS3 GT5 both at 720p60fps and 2xMSAA and 4xMSAA, proving Wii U is even weaker than those consoles (both GPU and CPU), once again confirming, with an exclusive AAA Nintendo game, what most previous multiplats titles showed.