@eejin It will be much more dynamic and provide much better functionality than GM does, eg. static bodies, dynamically changing shapes, multiple bodies per fixture, edge shapes, mouse joints, etc. As far as performance I can guarantee it will be much faster than GM because it is actually compiled and will use Box2D's overlapping test system for integrating collision checking instead of patching it together with bounding box or precise collision checking systems. As josh said we are not going to be duct taping this to ENIGMA like they did with Studio.
@ExDeus that depends on your interpretation of softbody but yes Box2D does allow a sort of emulation of softbodies using Joints and triangle strips...https://www.youtube.com/watch?v=6xZFmbTPVBk
@Josh of course I didn't make a Windows patch A) you didn't tell me to or explain how to either B) im not on windows