+ One on the stay away from NewEgg regarding LCD purchases - I went with my typical supplier with my latest LCD's and for 99$ get 2 years of free replacement if there is so much as a single dead pixel, and they pay for shipping. This is just an example compared to the nonsense Newegg will put you through.
I've been starting to track these 21:9 aspect ratio monitors. Kinda waiting for one is gamer-focused, runs at 120Hz, and has G-Sync. For games where you can control your FoV, it should be better than just going to a higher resolution monitor, like 1440p, without the hassle or bezels of going multi-monitor.
Kool, I was recently trying to decide if I should add 2 more 144hz 24" Asus monitors and go back to 3 screen surround gaming, or get the best gaming single screen solutions I could. Having had 3 screen, and not liked it all that much, (there are as many cons as pros IMO), I went with the Asus ROG Swift 144hz 27" 1440p Gsync. It's pretty much "the" gaming monitor right now, although it is a TN panel, it's as close to an IPS screen as I've seen. I also got a 4k 28" Acer Gsync screen.
To go with a really high end 27" or larger gaming monitor or 3 screen is totally personal pref, but if you DO decide to go the single route, my personal pref would be to spend the extra 150$ or so and get the ROG Swift. You get Gsync tech, as well as 144hnz, which is a huge difference, believe me. It has a hot button to drop you down to 60 120 or 144hz in game, and I'd forgotten how...laggy, for lack of a better word, 60hz looks compared to 144hz, as I've been using 144hz monitors for the last few years. Google any gaming forum about the advantages of 144hz, and you'll get a better description than I can provide, all I can say is that it's a major, major bonus in how your games look and perform. Also, the monitor is 1440p capable as well, so you kinda get everything in one sock with it - Gsync, 144hz, 144op, all in a very sturdy and well made product. I have a pretty powerful set of PCs, and running the 4k Acer just isn't "there" yet IMO, there isn't enough games that specifically support it, and with only a max of 60hz/fps, I just don't find it as good for gaming. For MMO games like WoW or EVE, games that don't require high fps and other performance, and are just "look good" types of games, 4k may suit, but for AH or anything else I play, I use the ROG Swift equipped system every time.
So, if you want a really, really wide screen like in the OP, I would wait until Gsync and 144hz type stuff are available in that size, and in the meantime drop down to the 27" size and get one of the newer high performance gaming monitors like the Asus ROG/Acer4k/Etc. If you're going to spend upwards of 800$ on a monitor, and your priority is gaming, get something that is dedicated TO gaming, with the above tech.
This is of course all just my opinion, and there are many others out there. This link provides an excellent thread comparing the 21:9 LG to the new Asus ROG Swift, my personal favored monitor (I wish I'd never bought the Acer 4k and just bought 2 Swifts). It does a great job of comparing the pros and cons of both. Believe me, if the LG in the OP had Gsync and 144hz, it would be my dream set up, period. Until it does though, those things matter more to me than the other advantages of the 21:9 LG.
This thread has about 10 really good pictures of both monitors side by side, and IMO it's a very fair and balanced review, and I agree 100% with everything this gent has written about both choices. If you take 10 minutes to read the thread, you'll see that everyone who has switched to 144hz is an instant believer in it, as well as Gsync. This is why I recommend Kool that you spend the extra bit of $ to get the Swift, as you'll see from the pics it isn't THAT much smaller, but gives you a pile of more "gamer" type important features for your money. Again, this is MY opinion, the guy who wrote the review/thread below actually ended up keeping the LG and selling the Swift - but he plays mostly slower paced type games, and that fit the bill for him. He summed it up very well saying the is no bad choice here, and for him there wasn't. For a more hardcore or serious gamer, the LG would be the one up on Ebay.
http://hardforum.com/showthread.php?s=247417a4ccf68ba9b8d4ea40300c1b62&t=1834794