RTX, as botched as it is right now, is a huge step forward.
In my opinion, the right step forward. We can push most games at 1440p/165Hz and 4k/60Hz. Yeah, more power is always good, but what for? 1080Ti and above can run anything already, so I'm happy we went in a new direction.
That same argument was made about a 280gtx, and a 7970, and a Titan, then a Titan X, then a 1080, then a 1080ti.
Game worlds are static, they don't use the same power or provide the same graphics year on year, they improve and use more power.
As for the random and rather arbitrary distinction of 1440p/165hz or 4k/60hz.... what if you want, 4k at 120hz? better resolution is better, higher speeds are better, more power is required to do both.
Even if you had 4 times the power and could run 4k at 120hz, the next year a more demanding game would come out and only run at 80fps, and the year after that a more demanding game would come out that only produced 40fps and thus you'd need more power again. That's the way it works, that's the way it's always worked.