Most of the games of the E3 plus other huge exclusives will be on Sony's platform.
They will have biggest portfolio for the remaining of the current fiscal year and some of them as at least console exclusive:
Shenmue III, Death Stranding, FFVIIR, Cyberpunk 2077, Avengers, Star Wars Jedi Fallen Order, CoD, FIFA 2020, Watchdogs Legion, Gods & Monsters, Rainbow Six Quarantine, Ghost Recon Breakpoint, Watchdogs Legion, Roller Champions, Doom Eternal, Wolfenstein Youngblood, in addition to TLOU2 and Dreams (and not confirmed version or date but seems clear that at some point willl be released at PS4/PS5) Ghostwire: Tokyo, Death Loop, BGE2, Wild, Panzer Dragoon...
They will continue kicking asses with PS4 until at least the PS5 release around November 2020 with many huge titles that don't need extra marketing effort from them at E3. And regarding next gen they don't need to worry about MS: their next gen plans seems just try to match the already known Sony offerings for PS5, PS Now and Remote Play.