I'm running four TVs from one D* box and a 1 X 4 powered splitter. Only problems I'll have is during power failures or anything that causes the D* box to reboot. Gotta have the powered splitter and one of the televisions on before the D* box boots up or I'll have issues with the picture intermittently going black. YMMV, but it does work quite well. The powered splitter is a 30-foot HDMI cable run to a utility closet. From there, the sets are 5, 25, and 75 feet away. The 4th set is next to the box and is fed via component. One port of the splitter is empty. All run flawlessly (except for the power cycle issue, obviously)
Walking the fine line between jaw-dropping and a plain ol' yawn.