I'm pretty sure the bit about most people not knowing about PS5 is incorrect at least. Sales are slowing down for a reason, everyone knows next-gen is coming dude. I doubt most gamers are anticipating TLOU2 or Ghosts either. Most people just play COD, Fifa, GTA, etc. and that's what they buy Consoles for, not exclusives. The reason Sony won this gen so handily is not because of those exclusives (sure, they sell like 5-10 Mil a pop, occasionally more, but that's only like 10% of PS4's current install base), but because of their marketing, Imo. They came out as the antithesis of everything MS was doing and represented, and it resonated with people in the gaming community in a way I have never seen before or since.
"Can't play used games or go offline on Xbox? Guess what, on PS4 you can (everyone surely remembers that used game sharing vid they did, right?)! Don't want to pay extra for inferior hardware and a crappy peripheral you don't want to use? Guess what, PS4 is cheaper and has no awful accessories bundled in! Want a Console that's focused on games instead of watching TV? Then PS4 is the Console for you!"
I still remember their E3 conference, and the reaction of the crowds to it, never seen anything like it in gaming. I truly believe that strong marketing is what propelled them to the number one spot this gen. I know it's what made me buy a PS4 over Xbox. It definitely wasn't the exclusives, it took years for those to come out anyway.
Now, do I think they absolutely need to put on a show like that again to win this gen? No, because of all the momentum and goodwill they built with PS4, but I do think it will absolutely hurt them if they don't start talking about this thing. I know the Sony from the start of this gen wouldn't have waited or let Xbox get ahead of them like this. I do agree with others that it feels like either Sony isn't confident in their product at this point, or are overconfident in it. I don't think either scenario is good.