Gsync is only relevant for those who play fast FPS or have games where you are constantly moving your mouse and controlling your character.
I have done a test and set Gsync off and on having used each setting for 1 month. I can tell you if you play fast FPS games, you will realise Gsync practically eliminates micro-stutters and slow downs when below your refresh rate. Usually those with Gsync and demanding games, even if your FPS is low, below or much below your monitor refresh rate, everything looks just so smooth despite showing a low FPS count.
I do admit Gsync does introduce some input lag but you do not get any stutter at all. It is hard to explain and substantiate it's worth unless you have tried it yourself with the games you play. For me, Gsync or go home. It just works.
Just make sure you mate a good GPU to a Gsync monitor and I would recommend a good 1440p over a 1080p if you have a good GPU. Newer panels with 1440p 200hz are coming out next year and it is going to become the mainstream standard for most gamers. Even 4k 144hz will be out next year. And both these monitors are exclusive to G-sync panels.
