I don't think it means anything big for Playstation necessarily. If anything it just means internally his handling of SIE was seen as excellent and he earned a promotion.
Kaz Hirai had his position and was promoted to CEO of Sony if I remember correctly. Under Kaz, SIE was one of 3 divisions that became a heavy focus but it was mainly because those were the 3 most profitable divisions and the company as a whole wasn't doing so hot if my memory serves. Jim's not moving to CEO and the company as a whole was doing excellent pre-COVID19.
4 ≈ One