4K monitors are taking over, but there are a number of pitfalls when implementing them.
Video cards: Even a lightweight card a NVidia Quadro NVS 295 (Passmark 103) will let you run at 4K resolution, but the PC is unusable. A more typical production card used by our architecture clients is the NVidia Quadro K2000 (Passmark 1672). The K2000 had no problem running a Samsung 75″ TV, and produces a fantastic picture.
Cables: New TVs include support for HDMI 1.4, which is the interface for 4K, but the wrong cables will cause the picture to drop back to 1920×1080. A 4K TV displaying only standard HDMI produces a terrible picture. Much like a PC monitor running at a lower resolution than it is capable of, you end up with distorted colors and very noticeable pixelation. The picture is so bad that you would be better off buying an older TV if you intend to run a PC at 1080p. The solution is to use all “High Speed” HDMI cables and converters. If the cable is not labeled High Speed HDMI, it will only support 1080p.
4K is worth the cost for any new conference room; just be sure you have the hardware to run it properly.
Look at our post on PPI to help you choose the right monitor.