I still think we're going to see a Bloodborne remaster at some point.
A lot of the games that have been ported to PC so far have been either Unreal Engine, or some of SIE's biggest IPs (or in the case of Ratchet were developed using the same engine).
Days Gone, Returnal, Sackboy were all on Unreal Engine, they were probably relatively easy to port over.
Horizon, Uncharted, The Last of Us, Spider-Man, God of War, are huge IPs.
This is what Naughty Dog said about the Uncharted trilogy, why they were not coming to PC:
"they would require a major overhaul visually to stand-up to modern PC releases and the expectations players may have"
PlayStation.blog
I think after Ghost of Tsushima, The Last of Us Part II, Gran Turismo 7, God of War Ragnarok are going to be higher priority for PC ports next year. Demon's Souls should also be coming at some point.
I think a Bloodborne remaster makes a lot of sense for the PC port stuff. If there's ever a period of time when Nixxes would have availability and aren't working on anything else.
But I wouldn't expect it for a while.