Earlier quoted context omitted.
I haven't been able to find it, but I remember a comment here on HN by a guy who basically said that gaming saved his life by helping him to zone out during a period of severe depression. I guess it's a form of mindfulness, in a way.
That's the exact opposite actually. Nit saying it's a bad thing though. But it's important to understand that screens are taking your attention away. You are not in the moment at all.
I used to game really heavily during a pretty terrible period (divorce + grad school) in an attempt to cope. Of course it actually just made things worse overall while distracting my brain to make it seem temporarily better, it diverted a lot of the energy I might have used towards engaging and fixing the problems.
When I game severely (FPS shooters are my crack) I can get focused for a dozen hours at a time. My body almost shuts down, I get into a trancelike state and my metabolism recedes. I forget to eat, I don't get tired. When I finally do sleep I will wake up the next day and actually have a headache until I play again for a little while. It was that kind of physical withdrawal that made me realize long ago how pernicious it was, at least for my particular physiology and brain. Now I will only play games like that in a social setting, never alone lest I fall back into that spell.
One time in grad school I stayed up all night gaming and I slept through my alarm. I missed an exam. That I was proctoring. I went straight to a pawn shop and sold my console when I realized what I was doing to myself.