It's hard to get totally excited about a PC hardware peripheral, given the smaller quantity of games (particularly hardware-specific titles) over in desktop land, but with Valve support and what appears to be the perfect control scheme (dual analog sticks, dual fully 3D-sensing motion controllers), we'd say the Hydra has a better shot at winning us over than anything else of its ilk.
ENGADGET: Razer Hydra Sixense motion controller eyes-on