Resistance: Fall of Man is one of the PS3's key launch titles

The revelation comes from an article posted by MTV News, which details some brief statements from Insomniac Games' spokesperson Ryan Schneider. "We're going to fit more on a Blu-Ray disc than you could on an HD DVD," he told MTV.
The HD DVD and Blu-ray formats are competing disc technologies. HD DVD handles about 15 gigabytes; the Blu-ray can handle 25 gigabytes. In comparison, the biggest PC games top out at around 7 gigabytes -- less than a third the size of PS3 exclusive Resistance, estimated at 22 gigabyes.
The massive storage size for the final version of Resistance (which the article says are "thanks to high-res graphics and orchestral music") could serve as a potent response to concerns that Sony's Blu-ray format has no benefit for gamers. In contrast, the Xbox 360 can only hold up to 8 gigabytes per game disc.

Other key details from the article:
* motion-sensing functions will allow you to rifle butt aliens by jabbing out one side of the PS3 controller
* Sony claims that the online experience will exceed Xbox Live titles
* 40-player online games, with some form of ranking system