Thoughts on that $250 4K Samsung monitor? I currently have a Dell S2716DG G-Sync but I wasn't sure if 4K>1440/144
I'm digging the $250 4K Samsung TN-panel monitor with 1ms Response time + AMD FreeSync. Keep in mind, that monitor doesn't support G-Sync, if you're an NVidia guy. The Samsung 4K supports AMD's FreeSync. Not that I use any Syncing most of the time anyways, since I really want those extra frames. And at 4K, trust me - you're likely going to need them extra frames; especially depending on what your GPU is; I'm using a 970, BTW.
I also don't know what's acceptable to you, framerate-wise. I'm more lenient on this stuff than probably most PC gamers, as I find it acceptable when I'm achieving over 30FPS. I prefer 60FPS, of course - but given the state of many PC ports of late, it ain't the end of my world if it ain't there; and I have to do some capping in-game or via MSI Afterburner. Some PC games have 30FPS caps or get broken when you force it over 30FPS b/c of how it was coded, anyways (i.e. Dark Souls PTD + NFS Rivals) - so, you might find some games where you're stuck at 30FPS.
If you're one of those that feel "I must have (at least) 60FPS on [insert resolution], no matter what" - well, then I hope you got a beefy system and/or beefy GPU/GPU's for 4K...or 4K ain't going to be for you. Depending on the game, I really don't mind say 30FPS if need be for more resolution + worthwhile eye-candy, as long as it ain't some sort of super-fast twitchy action game. If it's FPS, TPS, racing game, or something where movement's ultra-fast - chances are, I'm going to want aim over 30FPS and want something at least more in the middle of 30-60FPS but really want to be towards 60FPS, if it's even possible. For example, Doom 2016 - too fast and twitchy; I want 60FPS here.
Also, keep in mind - I jumped from 23'' 1080p to 28'' 4K. I didn't do the in-between step of a native 1440p monitor, so....to me, the difference b/t 23'' 1080p and 28'' 4K here is amazing to me. From your 27'' 1440p - I wouldn't be surprised if you're just not as impressed w/ 4K as say I'm impressed with it; I don't know how it'd be for you, so you'd probably have to find out the hard way, if you wanted to really go this route.
I've been throwing Fallout 4 & Mad Max at this 4K monitor w/ my 970 - well, Mad Max at 4K on High (with some tweaks here and there) looks amazing, but I had to cap it around 40FPS w/ MSI Afterburner. It's around 30-40FPS normally. Performance was anywhere from 40-60 frames up + down on the 970, when uncapped. Fallout 4 at High on 4K on 970, looks fantastic (finally looks good now; I thought it looked mediocre at 1080p maxed-out - too much just seemed washed-out to me + not the highest grade of textures) - and I was getting around 25-50 frames, depending on what's going on, on-screen - basically, I dropped it to 1440p for more performance, so that's much better there - when downscaling, just crank up at AA in-game or in NVidia/AMD panel; and throw-up Sharpness setting on the monitor, to knock down the blurring from the down-scale.
WWE 2K16 PC is probably my best performer, around 50-60 FPS at 4K w/ everything maxed except AA being off. Honestly, you don't really need AA at 4K, especially if there ain't much of anything out in the distance going blurry. And TBH, there ain't much in the distance in this game, anyways.
About your Dell TN-panel 1440p w/ 144 Hz - well, depends on how you feel about 4K, since most monitors doing 4K will top-out at 60hz (and you likely will be using DisplayPort to achieve 60hz, too). I think 4K's fantastic just for the extra work-space on the desktop, in Windows Explorer, in web browsers - I just have way more space for everything, compared to my 23'' HP TN-panel. It's like a whole another world to me.
If you're into the "I must have over 60hz Refresh rate in my games", you'd probably want to avoid 4K for now.
