Just because the Final Fantasy XIII Blu-ray demo powered Japanese PS3 sales, don't expect the same for the West. Heck, don't expect a Blu-ray demo for the time being.
When Final Fantasy XIII producer Yoshinori Kitase was asked by website VideoGamer.com whether there will be a Blu-ray FFXIII demo, the producer replied, "The type of demo version we released in Japan, we currently have no plan of doing that abroad, partly because we are going to carry on with the project alongside the Xbox version, so we really can't just make it available only for the PS3."
But does no Blu-ray demo mean no demo at all? "But we hear that the demo version normally means something that you can download in the West," Kitase continued, "so that is a possibility we would like to check." That's nice of them to check and all, but we're pretty sure demos are things you can download in Japan, too.
Kitase: No plans for Blu-ray FFXIII demo outside Japan [VideoGamer via Final Fantasy-XIII.net][Pic]