You all use tv about 32" or little more? For me, tv starts from 40".
There is no doubt, that a tv is not optimum for gaming. And an ips panel is even more behind concerning timings. But it is up to, if you can live with a slow tv and sit 1m away or you have a desk, where you sit 70cm away. I think, that most people sitting in front of a tv never informed in that topics or do not want to pay another money for extra monitor or the higher amount of money.
For fast gaming you should use a tn panel monitor, for slower games and better picture, you can use an ips pabel monitor. And for tv you should use a tv.
When you think about that, the next step is to evaluate the distance you are sitting and the resolution you prefer. In my example, I sit about 50 - 70 cm away and I prefer a 27" or bigger. But important for me: A Dell Ultrasharp 27" monitor with higher 1440p resolution do not get a bigger picture, than my 24" 1080p, but I would like to have it natively bigger. So, my intention is to buy again a 1080p, but in 27". This is optimum for my sitting position.
Important for me: I want an optimized monitor for my pc gaming. So I cannot use a tv, as it often has a bad response time or a high input lag.