Do this in both blender 2.8 and 2.79:
Create cube, enable rigid body physics, set to active, run animation, drag and release cube.
In blender 2.79 cube will act like a real life object, that is, it'll be "tossed" by a cursor drag. Doesn't work in 2.8, cube just jumps back in place.
Example - I can't do that in 2.8.