I would dare say that the warhead skips, rather than bounces, judging by the normal trajectory of the PG-7 projectile.  If they've figured out a way to make the projectile bounce straight up after it hit the ground then that would be pretty cool, but if performance the way I think it would then the user would have to either fire it at personnel in the open, or just be damn good at judging where the round would have to hit the ground in order to achieve desireable effectiveness.  With the range being supposedly increased to 1,500 meters, this seems unlikely.  I guess if you don't have artillery, this is the next best thing.