I am struggling to find an analogy but here goes. I think it's like the difference between a console in the cloud v/s a gaming pc in the cloud. For casual gamers, a console in the cloud with minimal configuration - switch it on and start playing - makes the most sense. If GeForce Now is a hosted gaming PC, I assume running a Windows O/S, it likely has the same configuration overhead of PC games, which most casual gamers don't want to deal with.