In Sony's 2020 corporate report, it states that it will "explore expanding our 1st party titles to the PC platform, in order to promote further growth in our profitability."
It's a smart move. Especially if the sequel is getting released soon like Horizon Zero Dawn. It gets released on pc and the hype machine for the sequel on the PS5 is starting to rev up. Might tempt pc gamers to buy a PS5 since it costs less than a high-end graphics card.