You're right it's not that I'd prefer to have only 80s and 90s games available - I think it's actually that I'd rather go back and live in the 90s. Again probably just a case of rose tinted glasses, but every game back then felt largely new.
It may not remove it, but it certainly devalues it with the endless stream of remasters, remakes and generally derivative nonsense
There's no limits being pushed with this though. A new "feature" gets rolled out, we get a couple of tech demos, and then it's forgotten about when the next feature is pushed out with next week's new hardware.
In the past we had longer product cycles (particularly in the console space), so by the end of a "generation" you'd get the best looking games and best performing games as developers optimised every inch for the hardware they had. New generations of hardware generally brought new types of games - mechanics that were now possible with more performance, or new types of hardware.
Not sure why you need good artists, when whatever they've painstakingly created is overpainted with AI filters
Because most of those weren't gimmicks. Moving from sprites to polygons allowed games that weren't previously possible (or certainly not in a convincing or performant way), programmable shaders allowed a huge step forward in realism and again effects that weren't otherwise possible or practical.
The others mentioned are all something of a nothing burger - even the much vaunted Ray Tracing has what a handful of games that really make extensive use of it, and afaik none where light being more accurate has added new game play mechanics.
If the DLSS5 screen shots are your idea of far more convincing, then I'll take the older algorithms that are less convincing due to their limitations any day