This virtual reality headset is just a technology demo from Sony, but it's easy to imagine that one day in the not so distant future, this will be how we all experience portable 3D entertainment.
Besides looking über futuristic, Sony's "virtual 3D cinematic experience" head mounted display (aka 'Headman') sports some fairly impressive specs. The tiny OLED screens inside are head HD resolution (1280 x 720), and the headphones integrated into the sides of the goggles are outputting high quality simulated 5.1 channel surround sound.
Since there are two separate displays, the goggles can create 3D scenes by presenting each of your eyes with a slightly different image. This is how your eyes see the world anyway, so once you get used to it, it's a much more natural way of experiencing 3D. It's also a plus that the design of the goggles blocks out all your peripheral vision and any ambient light, helping you relax into the experience, and the effect is something like sitting at the back of a very dark and private room containing a big screen TV.
Sony has no plans to make the goggles into a product, at least not right now, but I can see this being a pretty awesome portable entertainment device. I'd love to bury myself in one of these every time I'm on a bus or a plane, and it would be a handy thing to be able to whip out when conversation gets boring at the dinner table, too.