So long, Siri: Google Assistant for iPhone is available for download

Sorry, Siri, but it looks like your days may be numbered. Apple's virtual personal assistant software started a revolution and every one of Apple's rivals now offers a voice-controlled AI product of some sort. Interestingly, we've seen something of a role reversal in this important space. Apple typically waits until it comes as close as possible to perfecting a new technology, and then launches it after other companies have already dipped their toes. There are plenty of exceptions, but that's ge