Well.. nobody really wants 24"... that was like 15 years ago bro.
Since then, we went to 27" for gaming, then onto 30" (w/better aspect ratio), then to 34" wide screen(x34, etc)... now the market is moving into large format 40" Oleds @ 4k. Which is what most, if not nearly all the Gamers will land on, in the next coming years. Anything past 90hz seems to work real well. I'd rather have latency free 80hz, than 144hz for gaming. If you get solid hz, you do not need g-sync/freesync.
Personally, I have been waiting a very long time, to regain the feeling of my SONY FW900.. and I know many more are waiting for the day we get back there with modern equipment. But, what you are asking for already exists, but 27" isn't a winner & that size doesn't help anyone who actually building such a rig. 27" it is budget at this point... not a way forward. Or basis for wishing to build a rig around, etc.
Consequently, 34" Gaming monitors exists, so why would you WANT a 27" monitor instead?
That is nuts what you are saying. Yeah I really want to sit in front of a 40 inch 4k monitor. Really? If I want to game like that. I will use my 65" 4k tv. 27 is to big. I hate that I got it listening to people. ZOMG teh 27" 1440p G-Sync is boss. No. 24" is perfect. I will never go past a 24" monitor ever again.