Probably PS5 exclusive instead of PS4. Ghost of Tsushima is my guess.
I could almost see Ghost of Tsushima being done on the PS4 Pro, but not without some heavy "optimizations" which would result in it looking like a very slim version of the game we've been seeing up to this point. Regardless, the only reason they would even bother making it a PS5 exclusive is if they are years behind schedule.
Time to spin the wheel of uncertainty, will it land on good or bad news?
Yes.