Personally, I would not form an opinion until trying the mask myself. I won't even complain about people who do. Their problem, not mine.
But I see significant advantages in having a totally hands-free way of checking my depth, gas, nitrogen loading, etc.
I am an underwater photographer and videographer. With this mask I would not need to let go of my camera gear to check my computer.
I would think this would be an advantage for someone spearfishing as well. Wouldn't have to let go of the speargun with one hand, wouldn't have to move my hand and scare the fish.
If I am helping or rescuing a diver in distress, again I would be able to use both hands to manage the problem, while still being able to monitor my depth, gas, etc.
Scootering? Not sure, I haven't used a scooter.
I have never lost a mask, but it is possible. How hard would it be to clip a short flexible line to the mask strap? I have used a similar thing when wearing caps or hats on a boat.
Many people use a backup SPG with a wireless AI computer. Why would this be any different?
If your mask fogs, how many of you can see your computer and guages now? Duh.
In a zero visability silt-out I would still be able to see my computer. Anyone consider that?
Compared to a wrist mount wireless AI computer and a mask it is a bit expensive, but many of these computers are $1000 or more. And it is the first of it's kind.
The fact that military divers use them says something about reliability and functionality. I don't think they would use them just to look cool or have the latest gadget. Of course military divers usually have something else in their hands when they are diving. heh heh
But hey, I am a bit of a geek, so I am predisposed to like new things. I can't wait to try one!