$1000 might be good enough for playing the Vive and Rift games that launched with the platform. If that's all you want, I guess you're not quite so annoyingly pedantic as you first seem. But that's a really narrow use case. "I'd like to play only the worst VR games, please. Let's forget about keeping up with the market. That's not for me."

If you're just getting in as a consumer, a $1000 VR-capable PC is going to age very quickly. In my experience, the only way to get any sort of legs out of a high-end purchase is to buy the top of the line. Unless you're buying right before a major product release, my experience has been that you end up spending less year over year than if you try to commoditize.

But I took the person I was replying to to be asking about getting in as a developer, considering the blog post is about getting in as a developer, and considering this site is full of developers. $2000 has been very consistently the price one pays for "top of the line PC with parts that aren't going to shit the bed". You should not cheap out on a development PC for VR. You're going to be doing a lot of experimenting and running up against performance limits during development. You should have some headroom to avoid giving yourself a headache for the day.

But go ahead. Buy a Radeon GPU. Have fun not being able to use your VR headset right before a crucial demo because of some obscure driver issue. Cheap out on a crappy power supply. See how many investors you get for our VR startup when your demo PC won't even start.