I disagree. Microsoft Office hasn't looked like the rest of Windows for years. iTunes looks unlike any other OS X app. Photoshop has never used native UI. Non-n

I disagree. Microsoft Office hasn't looked like the rest of Windows for years. iTunes looks unlike any other OS X app. Photoshop has never used native UI. Non-native UI can be done very well as long as it's not entirely foreign, or an uncanny emulation of almost-native.