No doubt after a few months of the machine being released a Third Party Company could bring out there own version of the PS3 controller to have DualShock, like they did with the current 3rd party wireless controllers. The first batches had no DualShock as it would use up battery power, but there are some out there (got them for the PS1, PS2 & NGC) that have the DualShock & use very little battery power.
I'm excited about motion sensors, think playing MGS4 and you need to peek around a corner or look up a bit, no need to press a button, just tilt the controller and got a finger free to get a shot off to an enemy. Also would think that the Moto GP series would be awesome when trying to get your knee down in the corner & just tilt the joypad.