If the game is SteamVR-compatible, most VR headsets will work but generally the most common options are some variation of Vive/Rift/Index. That said, we don't

If the game is SteamVR-compatible, most VR headsets will work but generally the most common options are some variation of Vive/Rift/Index. That said, we don't actually know the requirements yet - as far as we know it'll require full finger tracking or be straight up Index-only (as unlikely as I personally think that is, it's still possible). Definitely don't pull the trigger on anything until the full announcement on Thursday.