And who's going to wager there will be a Shark Card equivalent to purchase ridiculously expensive in-game items that are too grindy to acquire the normal way?
I think it will come out on PC. The amount of money Rockstar/Take Two have made from the GTA V PC version would make them fools not to put in the effort. Even to this day GTA V on Steam is one of the most popular games being sold and played.