LOL...so now you will need the copyright on your voice.
I don't think we are very far away from very realistic-sounding synthetic vocals. Five years? Perhaps less. The speed with which technology is advancing is mind-boggling.
I have flown on this airplane at supersonic speeds.

Noise and cost is an issue that is currently being solved. We may in fact have another one in the, not too distant future.
There have also been some serious "over-promising" and "under-delivering". IBM Watson has had a very hard time in the medical field.
My guess is that looking out across a major city twenty years from now may be a very different picture.
Things tend to be evolutionary and not revolutionary
but twenty years ago many things that exist today would have been hard to imagine.
We live in a very strange world/time. People on one street are setting under a bridge smoking crack while a few blocks away people are driving robotic cars around on Mars.
Many wonderful things will come to pass. IF...we don't destroy ourselves.
Billy