I'm with you 100% on that. My youngest kid managed to drop my X10 about 4ft face down onto a driveway made of red chippings. Needless to say there was a nice inch long gouge on the screen.
Luckily I was clever enough to use a mirror screen protector (they're a bit thicker than the normal variety) and a silicone case. So once I changed the protector for a new one there was no sign of any damage (the screen underneath wasn't cracked or scratched). So if I do get an S3 then I'll definitely be looking for a decent case+screen protector combo - even if Corning's claims for Gorilla Glass are true then I'm guaranteeing that I can replace a scratched screen protector a lot cheaper than a damaged screen!