This is the cost of "The World's Highest Resolution Seamless Display" which was built for the IdeaFestival held recently in Louisville, Kentucky. For this price, you get 20 networked PCs, each equipped with two graphic cards, and controlling 80 projectors. You also get a screen of 27 feet across by 15 feet tall (8.5 x 4.5 meters) and a special calibration software to synchronize all the video sources. And you'll need to pay the electricity bill: this monster needs 30,000 watts of power to operate.
Read the complete story here. (Technology Trends)