kowenicki is correct, now PS3 sales will increase but in a couple months sales of the PS3 will decrease rapidly. Also future price cuts of the 360 will increase sales so poor people can buy it and of course we cannot forget about Natal. No controller required and the fantastic userface will really make the casuals jump in.
Natal is a real game changer. Not only for the ease of use but also redefining gaming by playing games like shooters without a controller. It's going to work so well Sony really needs to combat it and the glowing dildo controller just won't do it.