[prepromorphism]

I agree, that a good UI is a very important thing in desktop applications and elsewhere. But, to me replacing the border of a button with something "prettier" is usually a UI defect and not an improvement. Desktop environments gain a lot of intuitiveness and ease of use by being consistent. And every damned web designer developing desktop "apps" thinks he has to invent every convention of UIs new, just to be prettier. Usually they loose accessibility, the ability to be used by keyboard and or the ability to render with different color schemes and resolutions. And what do they gain? Pretty borders that serve no purpose and make the UI unfamiliar to everyone.