As someone who used to upgrade their GPU every year to the newest top card I find it to be indistinguishable from local hardware 95%+ of the time. It’s fairly mind blowing how well it works. Also just to clarify again I pay for the ultimate or whatever the highest tier of GeForce now is for like $20/month and use it primarily on a wired connection so that’s where my experience comes from. With their service you still need to pay for and own the games (though it also connects to Xbox game pass) so you’re only paying for the streaming. It’s also not something that depends on developers allowing it to be on the service so not every game is on there but the catalogue is quite large. I play on a 3440x1440p ultrawide at 100hz and I believe the ultimate sub supports up to 4k@120hz