That's odd. I'm also playing on PC and I haven't had any issues is the handful of hours I've put into the game. Playing on Win 7 with Nvidia card, as well. It's both played and looked great for me. Sorry to hear that you're having problems.
I do kind of wish that would happen. How awesome would it be to play Nintendo games on the ps4 or next xbox without their stupid hardware gimmicks? But I think that Nintendo is to prideful to allow their games on other systems, so I doubt that will happen.