Everything you want to know about PlayStation 5, all in one place.
blog.playstation.com
"If I have a PS4 game, can I upgrade it to a PS5 version?
Certain PS4 games can be upgraded to the digital PS5 version of the game on a PS5 console. When using a PS5 console, you may have the option to upgrade a disc or digital PS4 game to the digital PS5 version. Depending on the game, this upgrade may occur at no additional cost, may require a purchase, and may be available for a limited time. An internet connection is required. For more information, refer
here.
For an example, the PS4 version of
Marvel’s Spider-Man: Miles Morales, and the PS4 version of Sackboy: A Big Adventure both offer upgrades to the digital PS5 versions of the games at no additional cost. If you own PS4 versions of these games, simply visit the game’s Hub for that title on your PS5 (Note: you’ll need to insert the PS4 disc into your PS5 console first if you bought the physical disc rather than the PS Store version of the PS4 game), and you’ll see an offer to download the PS5 version."