Back in 2012 it was very simple: only Mac. Syphon+Quartz was great addition. Macbook Retina offered 3 video-outs of thunderbolt capture. And it is just my opinion, but for me Resolume was much more stable under Mac and video+audio clips played smothly on Mac and it was very hard to play with audio buffer size on PC to get some sort of smooth playback.
But everything is changing. Now we have vvvv and spout for PC, Resolume is more mature under PC, MacBook are too thin and tend to overheat, while big gaming PC laptops run stable fps and also can offer multiple videoouts + thunderbolt (even 3.0).
So what do you think? Is there a serious reason to stay on Mac?