GeForce NOW games have (potentially) been leaked - if this is real then Gran Turismo 7 will be playable on PC using it. (and a non-zero chance of a steam release) :
Comprar gran turismo sport pc steam 🥇 【 desde 20.6 € 】 | Cultture
Comprar gran turismo sport pc steam 🥇 【 desde 20.6 € 】 | Cultture