No, not an extra, you are the central character.Quote
Who knows?, we might someday find we are nothing more than a sophisticated, extra in a grand GTA RPG
I play Elder scrolls 5 and Fallout 4 on PC and use mods, you are making a valid point. I also own a Ps4 pro with VR headset. The new games have amazing graphics and although the graphics in the Headset are only 720p or lower you still get drawn into the games world very easily. I have a space ship flying game, its great and I have a real fun F1 racer that has you with cars seemingly all around you, incredible tech. So yes why not a simulation?
Here's short clip of Niels Degrasse Tyson talking about the subject its called are we living in a simulation [www.youtube.com] 2.49min slightly humorous
and here is a more slightly more serious explanation,
[www.youtube.com] 'You are a simulation' Nobel prize winner George Smoot 19min Ted talk