I always refer back to this video, he has a lot of excellent points.
Of course all of this varies depending on the persons workflow on the given device. Personally I don't know if it's actually be able to write 36 words per minute on a traditional phone keyboard, so I agree on the sentiment that a phone generally is not a replacement for a computer, but a Swype enabled keyboard I might actually get close.. I really like the idea of a pie launcher for the desktop, I use one for the phone, and while it's limited to a single "layer" it's still faster when doing routine tasks on the phone (music,maps, notes, internet).
Again, phones seem to be the forerunner for these concepts to be implemented, since AI is creeping in quickly - I haven't really found a great use case, but maybe actually listening to the sales pitches; "create a calendar note", "compose short message of ETA" could be something that can accelerate the day to day, maybe even run locally on the phone or computer?
For coding, AI acceleration is great. Sometimes you just want something that fills in a gap and can be replaced later. It doesn't replace the need for critical thinking in system architecture design but it's a great accelerator for prototyping.