Think about it the other way 'round: game devs are still targeting 8GB VRAM because two thirds of the installed base has that much VRAM or less. Yes, at some point 8GB will be fully outmoded just like 4GB once was, that time is not now and it isn't in the near future.I don't think 1080p is dead or 8GB GPUs are dead or anything like that. There was a time when 4GB was the most common configuration on Steam. That doesn't mean it's okay to keep putting 4GB on GPUs indefinitely.
Or let's try another method: name a game that doesn't run on 8GB of VRAM. I'm not asking about if you can make it unplayable, I mean show me a game that doesn't work at reasonable settings and at more than playable framerates on 8GB VRAM. I went back through the HUB review, along with Techspot and Jayz and GamersNexus and L3Techs -- every time they tested a game with "medium" settings at 1080P, the 8GB of VRAM wasn't a hinderence. Well, duh, look at how many gamers are running 1080P displays (around half) and how many are equipped with 8GB of VRAM (way more than half.)
The funny part to me is, all those tested games would've NEVER suggested ultra settings for an 8GB VRAM card. I wager at least a dollar plus a free cup of coffee every single game tested would've booted up on a 5060 8GB card and configured you for those same medium-ish settings.