Actually, pull-down menus were invented there - by Apple, when they were working on the Lisa and Mac GUIs. It's always been that way, some like it, some don't. I find it great on my MacBook Air that screen space isn't wasted by duplicating dozens of near-identical menus, and I personally don't find it a problem when I connect up to my Cinema display. I find it quicker to Cmd-tab between applications and know that the menus are always in the same place no matter how I arrange things on the display. I can also do things like have a window nearly completely off the edge of the screen (e.g. referring to a web page whilst coding) but still being able to access all the menus, so I don't have to drag the window back on to create a bookmark then close the window. There's pros and cons to both models.