I'm reminded of the big debate around CPUs a few years ago, when Crysis came out. One of the big things was that it was the game of the future, that you can keep coming back to again and again at every generation with new futuristic CPUs with their eleventy billion GHZ clock speeds...
As it turned out gaming didn't go that way, clock speeds didn't go up by much and instead CPUs went the route of multiple cores. Crysis never got to unlock its true potential because it banked on the wrong thing.
My point is there's no need to get too wound up about VRAM or anything, because no one knows what advances this generation will bring or what route devs will take in future. Maybe DLSS will become amazing and we'll all be able to render at 360 blown up to 8k, who knows.