Horace Dediu talks about Apple and Siri (3 minutes)

"For what purpose? To sell more iPhones? I think that is naive"

A bit paranoid but it is food for thought.

Personally I am more on the side of: Apple is simply putting something innovative and useful for people out there.

Apple might be a walled garden, but so far they have been extremely well with privacy and personal data management and not being evil in that context.