People said the same thing about calculators back in the day. They were wrong then and they're wrong now. Besides, I was talking about a UI - and speech is the most human and natural UI there is. Extremely powerful.
Actually, in grade school I was part of the study that proved calculators enhanced mathematical performance. This was back in the 70s. So for me, it's a real experience and not just copy-paste argument and that experience has made a very lasting impression on me. Like I said, the naysayers were full of it back then, and they're full of it now.