As penetrating as an IMAX nature film.
For a 105min movie, there's remarkably little information here.
It's basically a propaganda survey course for people unfamiliar with video games. Why, you might ask, would those people be watching this movie? It sort of comes off like a tourist video you'd see if you visited a really savvy corporate headquarters.
It constantly tells, and doesn't show. They talk about the art of games, but they barely highlight any game music, don't show any concept art, don't show texture artists painting on Cintique tablets, don't talk about AI design. They talk about originality, but don't delve into the myriad fascinating stories surrounding game development, and the astonishingly clever things that have been done in the name of necessity, they just mention that development is difficult. They play a lot of video game footage, but don't try to illustrate what immersion in a world is like.
"Look, Conan O'Brian and Jimmy Fallon are talking about video games. They must be mainstream." Anyone who cares who Conan O'Brian and Jimmy Fallon are, already knows that.
In short, it's just not a very well made film. It's too broad, they needed to narrow the focus down to a few carefully chosen stories.