During a press event at the Game Developers Conference, Sony finally showed its motion controller to the gaming press. Welcome to the world of the PlayStation Move.
PlayStation Move is Sony’s move against the Redmond Giant’s Project Natal!
Sony claimed that you'll be able to buy an entry-level Move setup for under $100, and there will also be a hardware bundle that comes with everything you'll need to get started.
PlayStation Move in action.
Also have a look at Mashable’s review on Project Natal vs. PlayStation Move.