Valve now offers a new SteamVR Performance Test on Steam to see if your system is up for the rigors of the upcoming virtual reality invasion. Word on the free utility is: "Check whether your system is VR Ready, and if not, whether its capabilities are bound by Graphics Card, CPU, or both." Also, there are apparently strings with references to both Half Life 3 and Half Life 2: Source 2, as noted on DSOGaming (who quite rightly point out this does not mean such games are in development). Here's word on the tool:

The SteamVR Performance Test measures your system's rendering power using a 2-minute sequence from Valves Aperture Robot Repair VR demo. After collecting the data it determines whether your system is capable of running VR content at 90fps and whether VR content can tune the visual fidelity up to the recommended level. For machines that are not VR Ready the tool can help determine whether capabilities are bound by Graphics Card, CPU, or both.