i see the sharing sites as a thread for tracker torrents, too many forums like x264-bb.com
can`t say if this will last but today there are many forums where you can find links for BLURAY rips on sharing files sites like rapidshare, filesonic, megaupload, etc
the great speed and the fact you do not need to seed make this sites a great alternative
you got the bluray forums for movies and the warez sites for latest software realeases so do we still nee torrents?
P.S. even the Pirate Bay guys started a file sharing service:
http://bayfiles.com