With a 640x480 display made to resemble a 42" TV set floating in darkspace about 6 feet in front of you, 22 Moo's Argo 3D headset gave me a headache. That said, it's still cool, even if they were illustrating its capabilities with some godawful Spy Kids movie. It is 3D, it accepts input from "anything," and is $550.
Yes, you are in the future now. Got ibuprofen?