10 minutes a day of extreme power usage is probably fine for people asking for directions to the store, setting calendar reminders, timers, checking for important emails etc. AI on your phone will be incredibly useful but power usage doesn't matter when total usage is less than 15 minutes per day. I don't think the average person expects to vibe code on the phone for 8 hours a day.

10 minutes a day or 15 minutes a day is what the inference workload is like on fairly small models. Once you start streaming in weights from SSD, things slow down quite a bit and become quite power hungry.