It was a bit hard to pin down the subject of discussion, but I assume it's something along the lines of Privacy/Data Usage in Terms of Services + technology's effects on society.
As to the question of what is being done with a year's worth of voice clips in the film, or any searches -
data-mining.
A slight off-point after watching the film: Kids yelling into phones making demands; wonder how many problems that will cause when they have to interact with the rest of human society (let alone their parents). Reminds me of the whole Caillou debate.
Nicole Alderman wrote: It's great that the kid is doing independant research, but there's so much bonding and chances for deep discussions when kids ask things like "why is the sky blue."
As someone who spent a lot of their time after high school around 60+ year olds, the experiences told through stories in reply to questions asked are something that can not be emulated by any amount of AI intelligence. Siri is never going to say "that reminds me of this one time I was...". Stories make knowledge more memorable, not to mention it's more entertaining, and usually because of a relationship with the person also more meaningful.