I'm really unsure as the what the uptake figures are going to be for the move. To be honest it don't think it will be an incredible money maker for Sony, but it's something they had to do to stay in the game. Even if they just break even (or pull a small profit like I think they will) it stops them from falling behind in the motion wars.
It think it's greatest strength is being an almost carbon copy of the wiimote. I know it sounds like an insult, but you have to look at the strengths of the tactic. They are taking a piece of equipment that many people are already familiar and comfortable with so there is less adaption required, and it also allows for easy wii-PS3 ports such as Dead Space Extraction that just can't be done on Kinect.
My only big problem with the move right now is the lack of good launch games. I actually checked out Amazon yesterday with intent to buy but couldn't see anything I wanted. I don't know if I just used the search wrong but I was only seeing about 4 games out during launch week o_O
Edit: This is Amazon UK I'm talking about.
