Agree with Tipsy.
To me, I think both Sony and MS are in deep trouble. I heard at PAX this year that NO ONE cared for either the PS Move and whatever the 360 thing is called (too lazy to look it up). Not that they were bad by any chance, people just didn't care about them. Also, why buy the extra hardware to play motion games when we already have something else like that, but already with the system. I don't know, I think it was called the Wii!
But the big factor: Little too late to the party guys. The whole Motion Control craze is pretty much dead, even Nintendo knows this. Yes, they still have the Wii Remote used with games like Wii Sports and FPS, but a lot now and are coming out later this year and the next aren't just using the remote as a 'wand', they work like a video game controller by turning sideways, but are still taking advantage of the Wii Remote by adding small, but creative gameplay mechanics. Epic Mickey (which I can't wait for) with it's paint brush is a great title for what I'm talking about. Most of the games on the Wii are that (or 3D 2D platformers).
Sony and MS seem like they are just trying to get the casual crowded in, but I don't think buying extra hardware with the only pricey systems is a good move at all. It's just not a good business move and are going to lose lots of money on both of these. And being they are just a little too late, I don't think it'll go down well.