I'd buy one if the smart-gun technology was as reliable as the rest of the gun.
I kind of wonder what the downside is. Let's say for an instance, that there was a 1911 with smart gun technology that in no way affected the mechanical reliability, accuracy, ergonomics, etc. The smart gun technology was built into the grip panels, weighed no more than normal grips, and (for the purposes of this), psychically knew who was shooting it, and was powered by a tiny fusion reactor that lasted two hundred years on a single battery pack.
You could authorize/deny any individual to shoot it.
What's the downside of authorizing yourself, your significant other, but not authorizing your toddler until he was at an age old enough to be responsible for the firearm? What's the downside of going on a long drive with a friend, and authorizing your friend for the duration of the trip (in case something goes wrong and he winds up with the pistol), and then de-authorizing him at the end of the trip?