DVD's best thing
is the commentary track.
(And digital porn . . .)
But I've heard folks say
UMD films don't come with
DVD extras --
No commentaries,
no alternate endings. Why
rent with less extras?
I guess Sony thought people would buy for the convenience of being able to take the movie with you and your PSP at all times. If they would have placed a hard drive in the PSP so movies and music could have been stored in digital format, it would have been great. Instead, you have to buy miniscule memory cards.