This is realy cool and what I have been waiting for – I think. Basicaly it is a transmitter-recevier solution for HD over IP. From the video it looks like it actualy does multicast. The only thing that I need to figure out is it ends up being pretty expensive to setup at the start, 250 per receiver and 300 per x-miter -it may be cheaper to just get another cable box.
The bigest advantage I currently see would be the need to only have a single media PC for any point in the house, instead of some additional local solution. I would still have the multi channel issue – but we are only 2 in the house.