According to series producer Yoshinori Kitase, you won't need a PS6 to play the final part of the Final Fantasy VII Remake trilogy.

Lead developers at Square Enix have revealed that the story for the third and final part of the Final Fantasy VII Remake project is now complete, and production of the game is on schedule. Speaking to Famitsu (via Eurogamer ),

The first reviews of Final Fantasy VII Rebirth on PC are very positive. On PC, the title is expected to look and perform noticeably better than on PS5.