I researched why the 5k iMac doesn't have video-in, and it seems that the reason is that the display has so many pixels that it needs to pieces of hardware to d

I researched why the 5k iMac doesn't have video-in, and it seems that the reason is that the display has so many pixels that it needs to pieces of hardware to drive it. Getting the timing and color calibration and what-not clearly wasn't going to happen externally, so rather than have a suboptimal experience they just took video-in out. There's also the issue that few video cards can drive that resolution. https://www.quora.com/Why-cant-the-iMac-27-5K-be-used-as-an-external-monitor-even-though-it-has-Thunderbolt-3-0-support https://www.quora.com/Why-cant-the-iMac-27-5K-be-used-as-an-...