sorry, that's simply wrong. OSX has menus fixed in the menu bar, not in the window titles, these are separate. And so far I find menus at the top still offer the best UX - no need to target the pointer vertically, the menu always anchored where you find it, a root representation of running apps other than their windows. Unity does almost everything the other way round - hidden menus, revealed wherever the top of your window is if you happen to figure out the right key combo or gesture. Discoverability? Who needs that, people can't operate something more complex than an iPhone app anyways...