Well you could try running other path tracing you know from Blender, etc. in real time, good luck XD In that sense it is an advancement both in hardware and software.
Modern games are far from "wow" to me, looks fake if anything, littered with useless effects making you blind more often than not.
You can also play with Unreal if you want to see the difference visually and in performance between rasterizing and tracing. Rasterizing is very limiting in what it can do and how much effort has to be put into it to fake most of the effects, they are static, baked in and half the time not even that
Sure it looks "cool"/different, but inaccurate. From first decent looking games such as HL all we got was shaders that litter games with endless fake effects to try and make them look "better". What did we get since shaders? Nothing. The whole industry is stuck and barely progresses.
Where is it going? Where non real time rendering has been a decade or more ago. How fast were shaders when first introduced? Snail. How fast were 3D accelerators when first introduced? Snail. Of course RTX cards are still snail at tracing, it's added to it, it also has rasterizing and shaders.
Vega64, lets say it's on par with RTX2070, is definitely not a 4k card XD Well if you consider 60fps OK then maybe, I don't.
No one likes the prices of newer NV cards, me neither, it's what happens when AMD gives up and sells their people to Intel, competition zero. AMD at this point is making GPUs because they can and because they are developing them for consoles etc. We won't see them push the limit soon if ever again. They focus on low-mid range cards and hopefully keep value more in their mind unlike the 400-500+Vega fiasco where NV cards were actually in reality a better value :/ Ever since GCN, buying a new AMD card vs a new NV card is often not in favor of AMD, at least in EU.
I have nothing against a corporation investing resources into improving OSS and releasing the Q2RTX demo finally. Sure they slap branding and marketing on it, but then who wouldn't. As far as their other demos go... they haven't made any at all in generations: https://www.nvidia.com/coolstuff/demos
Maxwell was the last.
Regular game devs... to be honest from what I see and read it's more turning into 3D modeling houses than game devs, they don't make their game engines anymore, they use free ones or get a license, Unity, Unreal, ... only the behemoths with established franchises have some of their own 3D engine.
Making adoption of new features in general left to those who make 3D game engines, such as Unity, Unreal, ...
Tracing has been around for decades, but no one yet invested enough in hardware accelerations and made it more accessible, NV now did because there is no competition on GPU market and they can charge what ever the hell they want for how ever little they want to offer.