>>268258137
Making it hardware exclusive doesn't make any sense for Valve. It wouldn't sell many headsets because most people aren't going to drop 1k just to play one game, and they'd miss out on a lot of sales from all of the other headset owners. It's in their best interest to make sure it works on any SteamVR compatible headset with some Index exclusive features that could convince people who were already on the fence about it to pick one up.
[spoiler]Also, we got 2 episodes while we were waiting on HL3, so they weren't technically wrong.[/spoiler]