The main problem with PS Move + Freepie is that it often requires recalibrating. If it is easy to set up the kinect with the bulb and it doesn’t require any further work, then I don’t see a problem. Except that you look pretty stupid with a bulb on your head but who cares really.
I would say the bulb is the easier option. Will it be the same as PSmove service, a light + ping pong ball?