Gravity effects: Not the same with R&C. The game in certain points lets you float in the air, unlike R&C.
Multiple spheroids: I've played EVERY R&C game. The planets are displayed as spheres but in the actual level they are flat like every other platformer minus SMG.
Instant Camera: Of course 2D platformers don't allow you to control the camera because there can't be different angles, we're talking about a 3D game here.
Two player control: I can't comment if you don't give any examples.
So yeah, SMG *IS* revolutionary and brings new things on the table.











