Possibly but does it realistically matter? I don't care why my games run on linux I just care that they do. I encountered a few cases where the native version was inferior to the wine version (Cronos is one example). With wine improving there is very little downside to just using it.

Could there ever be a killer app for Linux? One that would cause a not-insignificant number of people to decide that Linux was worth switching to, even if there was some pain of moving away from Windows?