If you aren’t interested in the games, or can play them on a great PC that makes sense. For the rest of us who don’t game on PC who want those games, it’s upgrading time
Could always play them on a ps4.
I don't forsee there being any Playstation 5 exclusives for the first year.
And unless you have a 4k 120+ hz HDR TV 60+ inches with a Dolby Atmos surround system, I don't think there will be much of a difference.
Hell look at the ps4 pro and Xbox one X side by side with the originals. You're not noticing much of a difference especially if you don't have high end entertainment systems
That said I guess it depends on how good of a trade in deal you can get on the old one and how much the new one is.
If you're talking a 400+ dollar swing, I think waiting is prudent