I fid this dilemastrange lol..
So you basically are trying to choose between buying something that just gives you better gaming performance, vs something that gives you access to a library of games you will not find on the PC? An argument can be made to "upgrade your PC now for a 3080 ad PSU which will no doubt set you back at least $600. Or spend $700 for a PS5 and a game or two. But here's the thing though. You can also wait a year for the PS5 to have a more compelling library, or you can also wait a year for the 3080 to drop in price a little too.
Unless of course pushing more pixels or faster pixels is that important to you.