We're just beginning to replace projectors and Smart boards with interactive TVs, and we need to run new cables. We'll need runs as long as 50 feet with 4K HDMI as well as USB 3.0, although it's possible that 2.0 will suffice. Any cables going over the ceiling need to be plenum rated. I've looked at long, plenum HDMI and USB cables, both of which are expensive and relatively limited in availability. I've also considered KVM extenders over CatN UTP. However, they require power, and I see them as a more likely point of failure. I also have yet to see a KVM extender that supports USB 3.0. Affordability is important too, of course. Has anyone found a solution that checks all of the boxes?
