I sincerly doubt this will happen because a great VR game would generally make for a lousy conventional game, and vice versa.
What VR shines in is small details, whether that's pulling an important item off a bookshelf or just tossing a Grenade where you wanted it to land. When it works you get a similar satisfaction you'd get if you were doing sports.
When you watch the trailer it's quite clear it's being designed around VR, Alyx is taking cover as opposed to strafing around enemy fire. You're grabbing bullets off a bookshelf to reload your gun. You're physically reloading your weapon. All this stuff wouldn't be interesting at all on a Monitor and Keyboard. They'd be automated by action keys or straight up automatic. It's only exciting in VR where you physically replicate the actions.
Honestly current gen VR hardware kinda sucks, the headsets are too low res so you get the infamous "screendoor effect" and nothing is worse than stepping on a cable and killing your fun right in the moment.
But I don't think it's a meme because physically shooting targets even in the current rough state is very amusing, and when VR magic works it will induce a feeling of awe.
I think Valve and their people definitely agree with me, otherwise they would not be competing with Facebook over this niche market. I think Half-Life Alyx is being made as the defacto Killer App of VR, the one everyone gets when they first install their VR hardware. So it's a long term investment. I do think that within the near future a good VR Headset and Controller will only cost $400 or less as they improve manufacturing. Oculus Quest is already hitting that pricerange.