Well, this thread is a bit of a mess.
I've had to do a lot of research on this not too long ago since my own sweet office chair has finally given out on me and I started gaming a lot more recently.
Basically, gaming chairs are gaming chairs, because they are made for gamers in one way or another.
But first, there is the question on what kind of gaming chair do you need? One for big TV screen or for PC gaming? For consoles it's like some guys here mentioned X Rockers and similar gaming chairs with speakers. For PC gaming it's the ones like office chairs just with a high-back and a lot of other things that make you really comfortable in them even if you spend all day sitting.
To make it simpler an example of an ideal high-end gaming chair would be:
1) very comfortable;
2) ergonomically designed with lumbar and head support cushions (so you don't develop a back or neck pain);
3) reclines with a degree locking function (so you can nap in it without falling over and adjust how much you want it to recline);
4) would have breathable material and certain kind of padding (so you wouldn't become uncomfortable sitting in it for half a day);
5) little pads to rest the feet on or even an extendable footrest;
6) tilting function, to adjust your sitting position;
7) adjustable armrests, ideally 4D (you could lift it to match your arm height, make it wider, swivel it inside or outside etc.);
😎 look good;
9) fit you like a glove in size;
10) quality, will hold you forever and a day;
11) etc.
I just summarized the things I've learnt when I was looking for a gaming chair. If you'd like you can go into details on
http://www.gamingchairsxp.com/ blog, that's where all this info comes from and you can get some recommendations on what the best gaming chairs are currently and why!
P.S. What I just described in this number list happens to be a DXRacer
😄 Many people hate on them because they buy the wrong size and it doesn't fit them. Every series is made for a different range of weights and heights so it is easy to get the wrong one if you do not check the size chart.
P.P.S.
If you don't want a gaming chair at least get a chair that's designed ergonomically, that way you should avoid the health issues.
Hope this helps!