Technically speaking, an Ultra HD display has twice the resolution of your typical 1,920-by-1,080-pixel HD monitor, in length as well as height. That makes the picture 3,840 pixels wide.

Silicon Image is hoping that you'll want to play HD from your handheld device on a big screen without taking the more convoluted WiFi route using DLNA, Airplay and the like. As such, the company ...