Well when sitting at a desk with a large screen; 4k is the only way to go. Picture is super clean compared to sitting this close to a 1080p screen. With standard HD you need to sit further back for a better picture but on a good 4k screen? Nope...as close as you want.
Depends on what you are willing to settle for ... unfortunately once ya get used to 100+ fps gaming w/ 10 bit color w/ ULMB, there's no going back.
To my mind (and eyes), 4k still isn't ready for prime time .... a) If it ain't 165 hz, IPS w/ ULMB, I'm not buying b) Perhaps the nVidia 3xxx series will have enough juice to get up over 120 fps in AAA gaming w/ 16 GB of RAM but we ainit there yet c) There's only a single IPS panel that can do 3840×2160 resolution and can reach a 144 Hz refresh rate (AU Optronics’ M270QAN02.2 AHVA panel) but that requires overclocking . There's only two monitors on the market that can do that.
ROG Swift PG27UQ - $1899
Acer X270 bmiiphzx - $1699
I'm not ready to spend that kinda dough and a $1500 GFX card to go along with it especially when they can't do ULMB . Lag is also a bit higher than I'd like @ 8.14 ... response time is 5.3. Note ... those are real test measurements not the baloney (4.0 response time) that manufacturers put on their spec sheets.
Until then, I'd rather stick with the Acer XB271HU @ 1440p, 165 Hz playing at 120 fps with 10 bit color and no motion blur.
Right now, here's how 4k fares in TPUs Gaming test Suite (pretty sure I missed 1 or 2 when scrolling thru snd trying toremeber in my head)
> 120 fps (4) games
< 120 fps (6)
< 90 fps (8)
< 60 fps (4)
There are 4 games where one could use ULMB @ 120 fps
There are 6 games where one could use ULMB @ 100 fps
There are 6 games where one would be relegated to G-Sync
There are 8 games between 60 and 90 fps where it's is a tossup as to what would give the better user experience.
At 1440p.....
There are 15 games where one could use ULMB @ 120 fps
There are 4 games where one could use ULMB @ 100 fps
There are 0 games where one would be relegated to G-Sync
There are 2 games between 60 and 90 fps where it's is a tossup as to what would give the better user experience.