Convenience the key?
Piracy will never completely be eradicated, although large numbers of current pirates might be converted by the implementation of more convenient systems. Downloading certainly isn't painless. It requires sourcing the file, waiting for the download, occasional corruption, it might also require uncompression, file renaming and cataloguing.
Yes, this pain can be reduced by intelligent clients and syndication feeds, but it's certainly not perfect or accessible to the average non-techie person.
What if this process was removed and high definition TV episodes, films and music were automatically available on your set-top box or media centre at the same time as everybody else across the globe; ready to play at a time of your choosing? I'm sure this convenience would be worth a subscription to some, if not most.
Some services are getting closer to this such as Sky Player/Spotify/Netflix etc and some even have media centre plugins; but I don't think we can say that it's there yet.
In terms of TV and film, piracy will always be around until they synchronise release dates worldwide. Why should another country be a season or more behind on a TV series?