Why not do both at the same time? Power draw. A microwave can take over half the available load on a standard household circuit. Most are wired for 15 amps before the breaker starts tripping. Heating elements are just as power-hungry, which is why you typically see electric stoves on a dedicated 240V, 20A circuit. I would guess most houses do not have the wiring to support this.
That's why responsible gun owners lock their guns up, not hide them. Furthermore, they educate and teach their children about the proper handling and use of firearms (which progresses from "don't touch and tell an adult" when they're very young to actual proper handling and usage when they have shown significant maturity and responsibility).
Child deaths by firearms accidents are usually the result of an adult being irresponsible with their guns, typically by leaving them accessible or by not following the Four Rules of Gun Safety. I would love to see parents be more responsible with their guns *period*, especially around their children.
With the jazz band I play in, we have a book full of a few hundred charts. When resorting them after a gig, I typically grab a small stack, sort it insertion style, set it aside, then do the same to another pile. Once a few piles have been done, they get merge sorted into a big pile. Big piles themselves are merge sorted, until all of my music is in order.
If a smart gun worked 99.5% of the time, go try to market such a device to a law enforcement agency or even the military. Go on. I'll wait.
Now that you've become the laughing-stock of gun salespersons to those groups, what did you learn? You need to vastly boost the reliability of such devices before even thinking of trying to sell them to serious buyers. Once the device failure rate improves by a few orders of magnitude, then try again. The actual number the military is looking for is of far higher reliability than a 0.5% error rate.
'Tis far better to gun-proof your children than child-proof your gun.
What's the best way to dissuade a child from playing with a gun? Take the magic out of it. One very clever method I heard of was from a CCW instructor who made a ritual with his son every time he wanted to play with the gun. He'd pull out his snub nose revolver, empty the bullets out, show the kid the empty chambers, make the kid count both the bullets and the empty chamber, then give the (still empty) gun to his son to play with to his heart's content. What happened? After a few minutes of dry-firing, the kid got bored with it. As he got older, actual firearms safety & experience were layered in.
Varying degrees of focus are required for various procedures. Think of brushing your teeth. Are you 100% focused on the action of brushing your teeth? Probably not. Now turn around and hand-solder some surface mount SOT-23 chips. More focused? You betcha.
He specifically stated that he chose a very simple and straightforward procedure to test the setup with. He wasn't performing an organ transplant or anything of touchy nature.
I doubt the surgeon was actively fiddling with the Google Glass and the HO setup throughout the procedure. Set it up, hit play, come back when the surgery is done.