We've tested extensively for durability in-house, and one of the reasons we went with the metal frame was to provide drop resistance. The combination of plastic shell + metal frame protect the screen/keys/camera module very well from their functionality being harmed.
We like to play our cards pretty close to the chest for new products until we're ready to announce, but rest assured that we're working hard on another product that is going to break the mold

We're also working on accessories for our next device for these very reasons. Excited to announce it all when the time is right

Might I ask, whether you're testing to a certain specification, and standard or are you just doing your own tests for durability? For example, certain mobile phone manufactures cater to the MIL-STD-810G specification. I tend to like pretty rugged devices, and I think for a hardware wallet it's definitely something to consider since it protects against certain situations which might arise. For example, a few discussions recently above the earthquakes, and safe guarding your seeds or hardware wallets popped up. While, I'm definitely not expecting it to be that substantial for obvious reasons, it's definitely something that other manufacturers don't seem to be targeting.