I think it would be hard to convince a company like From who has seen massive success with their last game to make another true exclusive for their console. Keep in mind, the point I was making about Demon's Souls and Bloodborne is that they
didn't come to PC. I would have loved it if they were each 1 year exclusives on PlayStation, then got a PC port. I could skip buying the console and wait a year if I knew I would get a PC port eventually. But both of those games were true console exclusives, so I had to buy the consoles to get my hands on them.
After the success of Elden Ring, I doubt Sony could justify giving them enough money to make a game of the same size and scope as Bloodborne that is a true console exclusive.
If by "exclusive" you mean it wouldn't come to Xbox, but would still come to PC, then maybe. Given some of the software sales numbers we've seen for the Xbox Series versions of games recently, I won't be surprised if any company not owned by Microsoft decides to skip the Xbox Series going forward.
Keep in mind From just did some deal with Namco to
buy the IP for Elden Ring. Seems like they want more control over their future. I think Sony owns less than 15% of From, so I don't think they're in a position to twist their arm.
Even if they did do some deal to block the game coming to Xbox, if future Elden Ring games come to PC then it's back to my point about not needing a PlayStation console. And I can't see Sony paying them a bunch more money to not put out a PC version of ER2. That would be terrible PR for Sony, and it wouldn't get very many PC players to buy their console. It would just be a dick move on their part.