They would have to leave the sensors out, but could cover the rest of the bezel. They don’t do it because then the sensors would be more visible. But I’d prefer them to put function over aesthetics.
... on the iPad. I have a nanotexture MacBook and double-checked. It's textured all the way across. But you're right, the bezel of the iPad is glossy (1). Why would they do that? Is it masked off or a separate piece of glass?