You'll need a beefy rig to get the proper experience -- or at least not a terrible one -- but it's a mark of what we should all expect over the next year: a wide-scale expansion of VR content on Steam.
With SteamVR, the consumer build of the Oculus Rift and StarVR on the horizon, we were always going to be hit with the weight of VR demos on Steam at some point. And Crytek this week was happy to provide, pushing out their Back to Dinosaur Island demo for free over Valve's digital platform.
"Back to Dinosaur Island has been built from the ground up to take advantage of the Oculus Rift HMD, and requires an Oculus Rift DK 2 device to run," Crytek advises. The minimum system requirements are pretty high too: you'll need a minimum of 16GB RAM to get started, along with an i7-2600K, GTX 980 or R9 290 (are those two GPUs on par with each other?) and, of course, an Oculus DK2.
If you don't have a DK2, but want to see what it's all about, the below video will give you an idea of the content. It can't replicate the feeling of being immersed in VR, mind you.