Why is 60fps a huge deal? Both MKW and MK7 ran at 60fps.
The big question is if the game can actually do it in multiplayer, which MKW could not (at least online, from what I remember).
60fps should be a must for all games. It really makes them feel alive, fluid and with a real sense of speed... Even strategy games would benefit from 60fps... Its what makes the PS4 so heart breaking that the developers seemed to have decided to wring out as much fidelity as they can by sacrificing the frame rate. Every exclusive will be 30fps. Nintendo targets mostly 60fps, as they are a gameplay over fidelity company and I appreciate that about them.
MK7 and MKW both did 60fps online... playing online shouldn't change how the processor/gpu perform.
So far we do know that its 60fps up to 2 players, and 4 players it drops down to 30fps... 60fps online play.