excerpts from another blog

http://kotaku.com/gaming/ps3/whos-going-to-lose-hd+dvd-blu+ray-or-you-318176.php

The reason gamers won't be able to play the Transformers movie on PlayStation 3 is because Toshiba anted up cash to Paramount to lure the studio over to its exclusive HD-DVD camp. Previously, Paramount had released all of its titles on both platforms. According to industry insiders at the event this week, Paramount was paid as much as $150 million to make the exclusive move for an undisclosed amount of time (perhaps as long as 18 months). The studio is rumored to have been paid $50 million alone for the Transformers HD-DVD exclusive, according to executives at the conference who didn't want to be identified for this story.

...

One home entertainment executive, who supports Blu-ray Disc, said if Microsoft was serious about HD-DVD they would put it inside of the Xbox 360. In reality, many home entertainment executives believe Microsoft is doing all it can to continue the format war for as long as possible. For Microsoft, which wants digital delivery of entertainment like its Xbox Live Video Marketplace to become the key form of consumer consumption of entertainment across multiple PC and Windows Vista-enabled devices, having a clear-cut winner in the next gen DVD war is not to its benefit. The longer consumer confusion continues and the longer many consumers remain on the sidelines awaiting a single format to emerge victorious, the more digital delivery-enabled devices are sold into the market.

"There's an 800 pound gorilla trying to confuse the consumer in an effort to get control of online content in the future," said Mike Dunn, worldwide president of 20th Century Fox Home Entertainment. "A lot of people will end up paying money for a format that won't be around in 18 months."