Nothing says 2020 like having a good system and having a system for the poors.
This whole thing reminds me a ton of the 360 launch. I doubt PS5 will have the same technical issues but I wouldn't be shocked if all of the games they just showed are going to get delayed by a year or rushed out with some compromises just due to social distancing realities.
I can't imagine a bigger waste of time than Demons Souls in 2020. Dark Souls 3 is pretty much Demons Souls 2.
Gran Turismo is a wait-and-see. I think 5, 6, and Sport all got considerably better over time. No reason to jump on that early.
Spider-Miles, Ratchet and Clank, and Horizon 2 could all potentially be great. Imo, PS4's exclusive lineup is full of 8/10 and 9/10 games that all have room to improve as sequels. Not enough information for me to get too excited, though.