It's hard / impossible to tell from the images but there's the tiniest amount of rounded concave to the keys. When I look at it from the side you can see the k

It's hard / impossible to tell from the images but there's the tiniest amount of rounded concave to the keys. When I look at it from the side you can see the keys sink towards the middle, but it's a lot less than other keyboards where this feature is more distinct. It's much less than the Thinkpads. Thanks for the tip though. As I was writing the post I was thinking about what other characteristics there were of keyboards and I never thought about that one.