Looks really awesome, im totaly for it =)
But it'll be hard to find curved 4K monitors at a decent price, thats why he probably went the TV way.
But downsides with TV's is response time, and make sure you got HDMI 2.0 or yu'll go 30Hz, 30fps is not fun.
After i got my Philips 43" 4K LED BDM4350UC monitor i found this, http://www.displayspecifications.com/en/model/57f86d7 a curved 4K, but its not IPS panel wich is important to me. It's not the best response time but its good for me and the types of games i play.
I gave up fiddeling and constantly try to fix broken stuff in games, ie (broken HUD, misalinged markers, NO FOV slider if multiscreen, NO DSR Resolution options if using nvidia surround the list goes on)
I Also learnt here that by going to a 21:9 I would have mostly the same problems.
And I really could'nt play on single standard 23" 1080p monitor. I get motion sick no matter the FOV because I got used to triple-wide and have had it since nvidia 200 series. =)
I now have a huge library of games I can play in standard 16:9 and instead of fixing broken stuff I can now dwelve in making it look awesome, DPS resolution ReShade, 4K textures mods etc. Hiting up a older game can be really fun today. And with todays hardware, some stuff can really shine!
I choose a Philips 43" 4K LED BDM4350UC, it got a lot of fluff but most importantly it is an IPS and it's just slightly glossy, which makes some games look stunning with the right "pop" an filmic feeling. Replaying Mass Effect 3 now, and its stunning from what i remember with mods, better textures and shades.
For driving, flying simulation I mostly now uses Oculus Rift.
But i was a bit scared of get rid of my triple setup, for work and such so I also got this for the 4K monitor, that way i can just lift it up and use as a fourth monitor. But im starting to get used to large real-estate when working..so its stays mostly down.
Ergotron LX HD Sit-Stand Wall Mount LCD Arm
https://www.youtube.com/watch?v=IXhOVMBx1hc
+4K 