If tomorrow we wake up unable to play video games, we would be kinda disappointed, but our life would keep going normally (unless you're a game developer).

If we wake up unable to access banking, communication or transport, our life would be more or less ruined, for everyone.

I think a lot would actually change if we had no videogames. I'm pretty sure suicides and crimes related to mental health would increase. But it's only my opinion - I'm not a researcher.

They don't do anything essential. You could replace them with jigsaw puzzles and we'd be fine and likely better off in many ways, because that's less addictive and less resource intensive, too. We just wouldn't have as much fun.