MatrixStream appears to be one of the first to bring a 1080p set-top box to market. Geared towards 1080i and 1080p video over broadband and uses H.264 (or MPEG-4, Part 10) compression to keep the picture quality up and the file size & bandwidth required down. Trials of the new 1080p set-top box start this month and a consumer roll-out is slated for the end of Q1. Grab the 70MB WMV file of the Mac mini-looking device in action here.