Bests & Worsts Reviews from Amazon

I'm torn here. If I had purchased this solely for TV use, it would be 5 stars all the way. As it is, I purchased it as a PC monitor and here there are trade-offs, hence the 4-stars. Yes, this will do 4k@60Hz BUT not at 4:4:4 color. For the PC folks, 4:4:4 is effecively 24bit color. I'm not a pro so I'm not sure if it's 4:2:2 or 4:2:0, but the yellowish fringing al ALL the single-pixel lines tells me that it's not 4:4:4. Basically, if 4:4:4 where 24bit (8bits red, 8bits green, 8bits blue), 4:2:0 would be more like 12 bits red, 6 bits green, 1 bit blue except that HDMI uses YUV which is luminosity (how bright), hue (what color) and saturation (how washed out is the color). This is because we are MOST sensitive to brightness, less to hue and less still to saturation. The trouble here is that there isn't an equal amount of data provided per color/sub-pixel and it can cause funny effects for computer graphics that aren't noticed on video because video adjusts for these variables AND is rarely as detail oriented in a unnatural way. Anyway, my GTX 980 actually negotiates all the way up to 5793x3055 (is that 5k?) at 60Hz, 32bit and the display takes it, but of course, once it scales, it's not clear. This is over HDMI 2.0 (I KNOW many of you are going to think I'm full of it so see the screenshot below). At 4k/60Hz, it's not a bad display at all and with smoothing on, there is mouse-lag, but without smoothing, there is NO latency. The smoothing actually works quite nice when gaming to affect >60Hz (frame interpolation) in a valuable way. There's a bug in the present firmware where each time I power it up, I must turn off "Super Resolution" (no idea what that's supposed to mean, but it looks like it takes it from 4:2:2 to 4:2:0 color to me). The best explanation I've found is here: http://www.avsforum.com/forum/166-lcd-flat-panel-displays/1381724-official-4-4-4-chroma-subsampling-thread.html The color is consistent across the display, but at the ~2ft distance I'm using it at, there is some shimmering at the edges that goes away if I move toward it (wide viewing angle shimmers a bit). It's just enough that text gets a bit hard to read and the image looks a little washed out at the edges (unless I move to look directly at it). As a TV, this wouldn't be an issue because you'd likely be at least twice as far away. The built in speakers are respectable and almost invisible as they port out the bottom. The power button is interesting to; it's behind the bottom of the display and is like a little joystick. If you want a <$1k, 40" 4k PC monitor, it's not bad but I think I'll be trying the Samsung next because I feel like I might be giving up just enough visual quality that I'm not satisfied and if I can't that with the Samsung either, I'm falling back to the Samsung 32" monitor with DisplayPort support, but I sit and stare at my screen >8 hours/day so I'm likely a bit more picky that most. UPDATE: Just confirmed in the manual and with support that this monitor presently DOES NOT do 4k@60Hz 4:4:4 ( http://www.lg.com/us/support-product/lg-40UB8000# )