If they could figure out a way to talk to Siri without having to hold the home button down first, I'd be sold.
Imagine if the iPhone was always listening in the background for a certain phrase that you could set up? It would be awesome if you could have Siri set up to listen for when you say "Hey Siri!". The phone would then wake up when it heard that, and ask you what you wanted.
That would have been super awesome.
I was so just thinking this like if you were in the shower. You could be like Hey siri text so and so running late. Would be awesome. Without pushing anything.