In all likelihood, it won’t actually be “rocks” of course, but maybe a bit of sand that might inadvertantly get into your pockets if you do frequent places that are both windy and sandy, eg. the beach.By the way, every iPhone I’ve owned I used Power Support screen protective films. They are great. It appears too soon yet to see if Power Support has tooled a new film for the iPhone 12. But the Apple Store shows a screen protective glass from Belkin for the iPhone 12 Pro. I’ve heard of those thin sheets of glass Screen protectors. I might try one.
I was curious, if the new screen has ceramic shield, if it’s more scratch resistant. It seems from what I’ve read, we don’t know yet. Someone mentioned they don’t carry an iPhone in their pocket with rocks in there too. I definitely don’t carry anything else in the same pocket as the iPhone. But just in case something unexpected happens, I’d feel better with the screen protective film.
And I thought I’d mention something funny. Speaking of rocks in their pockets, many years ago, I bought a used iPhone 3GS. It was for an accessory project I was designing for the phone and I didn’t have one. So I bought a used one on Craigslist. It was $200. It was nothing like described. Since it didn’t matter if it was perfect cosmetically, I bought it anyway. I could tell the seller had it in his pocket with his keys and coins and whatever else. The rear case was pitted from stuff banging against it, the screen had a few small scratches. And for a time, it had a case on it and the case left wear marks on the bottom of the iPhone. This is of course very early days of iPhone use, so they didn’t have the knowledge and processes they have now for cases that won’t scratch the device. I could not believe someone could treat their stuff like that!
Sand definitely seems the likeliest thing that can scratch the screen. And that’s why photographers typically take extra special care w/ their lenses and such (and use protective, clear lens filters, etc) when in such places...