Well, having played the game now, I'm able to fully comment.
Yes "jaggies" are noticeable in the game. If that's something you find detracting it may be an issue for the game. However I think it looks absolutely stunning and I kind of like the crispness of the visuals that is given due to no AA. (it doesn't look like everything is through a soft filter). However if sacrificing AA was for 60fps. TOTALLY WORTH IT. I'd take the smoothness any day over softer visuals.
To me MK looks fantastic. That duplicate frame every 64 frames is noticible, but only if you look for it. Overall as someone with both a PS4 and Wii U, I have to say I'd be happy with the visuals on MK8 if it was one of my PS4 games. Infamous is more technically impressive thanks to how much more is going on, but Mario Kart 8 is certainly in the same league from aesthetics.
RIP Dad 25/11/51 - 13/12/13. You will be missed but never forgotten.
