I wonder if these "SmartAssistant" programmers ever actually had a human personal assistant. For most of what you need them to do, you don't even ask them to do it, they just know you and do it. An actually good computerized SmartAssistant would know that it's been a year, so it's time to book my physical with my doctor. It would have contacted the doctor's office for me, checked my calendar, scheduled the appointment, and then proactively reminded me a few days in advance. I shouldn't have to say "Hey, Assistant: Please schedule a physical for Doctor X at Clinic Y on July 1 of this year." (by the way SmartAssistants can't even currently do that).

The voice interaction should only be for exceptional cases: "Hey, Assistant: My trip to the Paris office needs to be delayed by one week." The assistant should then go and re-book flights, hotels, and rental cars, and then when finished, merely say "Done."

Until they can do this, tech companies might as well stop bothering releasing incremental crap products that can barely understand a task I'd expect a 4 year-old to be able to do.