I dont know really, I haven't played any sony titles since the ps2 days and looking at their catalogue there is nothing that really interests me. The only exception being helldivers, though I would have refunded that if the psn crap went through. It is also more an arrowhead than sony game.

I dont think I have steam friends playing actual sony games either, perhaps my perspective is skewed but I believe you overestimate the pull of the console franchises for people who can choose out of an enormous selection of games on steam, with plenty high profile ones available.