You needed a VR ready PC three years ago anyway when the CV1 and Vive released. It's nothing new or shocking on PC. There's always been that one thing on it that you needed to drop hundreds on to upgrade just to play it. Doom, HL1, HL2 and Doom 3, Crysis. These were all landmark games that required that you needed a new build just to run them at optimum performance, and not even maxed out. Fair enough, you need to invest in a HMD also, but for the experience of what they are, they're worth it, despite what the naysayers of VR will try to tell you, and there seems to be a lot of those.
Edit - didn't read Kash's post, before I wrote that. Beat me to it.
Pretty soon, when (not if) headsets eventually become technically and economically viable , wireless, and just be used as a streaming apparatus like the Quest can be, then more games in big franchises will make the jump. If people are disappointed by a new HL game being VR only, be prepared for more of this, especially if Valve do decide to make HL3, because that too might end up being VR. Valve seem to be in a mood now where they want to push the envelope and do something new, and that's a good thing. They should be applauded for taking the risk ( same as Capcom should have been), but instead they're getting the opposite.