If PS3 owners are anything like we are here on the almighty interwebz, then of course Move will sell to non-PS3 owners. We current PS3 owners don't give two shits about motion control, and actually think it's a detriment to just sitting back and enjoying games. So mostly non-PS3 owners will be the ones interested in Move.
Sony shouldn't want Move to sell to the core audience. They should want it to sell to the "expanded" audience, and I mean....Sports Champions and what not. If us current PS3 owners wanted that...we'd have just gotten a Wii
However, you must also take into consideration that there are some people that want motion controlled, casual games, as well as the hardcore experience you'd get with the PS3 or 360. I've seen detractors on both sides (Seece trying to somehow say Move is more expensive than than Kinect because for some reason 4 people are required to enjoy Move so you need 4 controllers; PS3 fans saying Kinect at $150 is just too much), but for those who want the best of both worlds, the Move bundle (or the Kinect bundle for 360) is a MUCH better deal than PSWii or Wii60. And it makes buying games easier as well
