Sony have announced some updates to the firmware for both the PlayStation 3. The big feature is upscaling of PS2 games and DVD movies to 1080p, but it "also gives PS3 owners more flexibility to enjoy their digital entertainment content where they want to" by using a PSP to watch your music, movies and photos. It might be where
you want to, but I suspect it's not how or when you want to (at least until someone hacks it so you can do it on your PC and other devices). The press release
has some more information.