This is what SCE Vice President said back in 2015:
As there was a hand of favorite game title, no longer need to re-buy for every model change of the game machine, can continue to move even a hand-held game in the future of the gaming machine in the long span.
When the out performance enhanced version of "PS4.1" specific machine, what was 30fps in the current PS4 might be able to play at 60fps. In terms of "PS4.1" specific machine has been enhanced performance, it might be to be able to play in 4K native if corresponding to the HDMI 2.0. Also, if in response to the HDMI 2.0a, that the patch that is provided, it may be able to play the hand game with HDR enabled. Without re-buy the remake, such as HD Remastered at full price, in the "PS4.x corresponding patch" is provided at a low cost, path is provided, such as can be upgraded to the evolution version of the better image representation It might be so.
Selling patches is something I've been considering for a long time.
The PS5 Exists.
