I think people who see the PS5 release as being as far off as end of 2020 are just crazy. That's over two years from now. What do you expect Sony to do for the next year and a half, just keep showing new trailers of years-old announced PS4 games? While Microsoft and Nintendo continue having events and announcing new stuff, you just expect Sony to sit back with some vague promise of a future PS5 announcement for the next two years?
At the latest, the PS5 should be unveiled during summer 2019 for a release either holiday 2019 or early 2020. I'm still hoping they'll opt for late 2019.