Does OS X need a refresh as well?
Just a thought. I personally feel it could benefit from a touch-up or two in the core UI. The individual apps and the hardware is beautiful, but it just feels especially disjointed now in comparison to iOS 7.
(Full Disclosure: Ubuntu was my first taste of a Unix-based OS. Whenever I see that top bar in OS X I'm instantly reminded of just how damn ugly Ubuntu is in some places.)