My personal hunch is that Apple is going to heavily roll out physical/location context in the next few years. If my friend has a future Apple TV, I should be a

My personal hunch is that Apple is going to heavily roll out physical/location context in the next few years. If my friend has a future Apple TV, I should be able to say "Hey, Siri"* and have Siri recognize that it's me and make my entire media library available for playback. This isn't as hard as it sounds, I don't think--Apple only has to search my friend's contacts' voices, I'm probably on my friend's wifi already, etc. * iOS 8 includes the ability to say "Hey, Siri" at any time when your iPhone is charging, but I've had crap luck with it during the betas (trying to use it in my car).