Here's a picture of what it looks like when you're wearing it. The man wearing the device is my boss, Henry Blodget:

It's very hard to describe what it's like to use Oculus.

You put the headset on (over your glasses, if, like me, you need t0), stick a pair of earbuds in your ears, and suddenly it feels as if you are in another place.

For example, you might find yourself standing against a rail at the top of a very tall building in a rainy city at night. Look over the rail below you, and cars are moving on the streets. You can walk around the platform, and the world changes relative to you just as it does in real life. If you are afraid of heights, your palms will start to sweat and you will become as uncomfortable as you would be in real life.

This happened to a colleague of mine. He was standing in the middle of a conference room with the Oculus headset on. As soon as Oculus put him atop that virtual tower, he shrank with fright and began to back way from the virtual rail.

Here's a picture of Henry moving in close to a virtual object, hands up so he doesn't bump into it: