https://wccftech.com/no-one-should-be-disappointed-at-ps5-exclusives-also-launching-on-ps4-says-sony/

Shortly after the PlayStation 5 showcase that took place yesterday, Sony quietly confirmed that several PS5 exclusives are actually also going to launch on the current-generation PlayStation 4 console. Specifically, Marvel's Spider-Man: Miles Morales, Horizon Forbidden West, and Sackboy A Big Adventure will also be available on PS4.

Some fans were puzzled to find that out, to say the least, as Sony has been drumming the need to mark a new generation of hardware with tailor-made software that could only run on the PlayStation 5.