If you put the screen face down on a table, does the screen touch the table at all? Also concrete tends not to be super even, so a 1mm gap might not save it from being hit especially if it goes down with some force.
It would probably protect the sides from getting scuffed up too badly though, but I feel like I would be annoyed more at having the protector than the value it provides.
I dropped mine the other day. Ceramic in both bathrooms, where I NEVER put on my AW. Carpet, pergo or linoleum everywhere else. I make it a point to put on my AW in carpeted areas, either my bedroom or the carpeted area of locker room at my gym. Mine simply bounced and I didn't bother to even look at it for damage because it was like falling on a firm pillow. As for you guys putting on and taking off your AW while walking through the terazzo floor part of the airport or while rock climbing at Yosemite, or the concrete part of the parking lot, perhaps you should wait until you get to a softer area.
And although I'm having a little fun at your expense, I do agree that at the prices Apple is charging, it would be nice if these things could go through a few drops on hard surfaces without shattering.
So did yours shatter also?
I can't imagine the dropping being such a big deal once your watch is on your hand. If you're outside you should have very little reason to take your watch off completely. That's unlike the phone where you're always taking it in and out of your pockets and using it without any strap.
When you're at home you could easily do it over the desk/table where your charger is, on carpeting, or even if you have hardwood floors it probably won't shatter. If you're a very clumsy person just sit down at a table to put it on.
I get that accidents will happen and that Apple should make this as durable as possible but I feel safer about my watch than I do my iPhone. If you screw it up once the odds of doing it again are probably slim unless you're really mega clumsy and not careful.