I shake my head every time I see these because as someone that works as a product designer I know what isn't even feasible to do. These artists create work that has no basis in the real world, and add positively ignorant statements about the construction and capabilities of these devices.

I see comments like, "Carbon fiber alone is perfectly rigid and doesn't bend." and can only shake my head about how stupid this statement is. This particular mockup is one of the worst I have ever seen for being unrealistic. Feel free to create industrial design concepts, but at the very least don't comment on features that are unrealistic.