Sony Computer Entertainment America (SCEA) announced that several new PS3 game demos and trailers have been released on the PLAYSTATION Store, including a demo for the PS3 exclusive, Ninja Gaiden Sigma. In other news, sales figures published this week by Home Media Research showed that Blu-ray Disc sales accounted for 70 percent of high-definition film purchases in Q1 2007. Blu-ray also became the first high-definition format to sell more than a million discs, achieving the feat in less than a year.