Imagine a world where every phone gets turned into a useful digital assistant that can order things for us online via APIs. I wonder if Amazon is ready for this.
I think the more interesting world is where AI assistants overtake the GUI as the primary interface for many operating system functions. It's my belief that the lasting innovation of LLMs will be finally making voice a true first order interface for our computers. "We'll just be talking to them" is something I've heard since the 90s and it seems like we can finally see that reality on the horizon.
This will be the case until we have AI agents that are as intelligent and competent as a top-percentile human personal assistant. At the point where that's possible though, I doubt the future of phone interfaces will be the most interesting change.