That's already happened to some extent. Xcode and Final Cut both run in multi-window yet effectively fullscreen mode, but act as IDEs for their respective workf

That's already happened to some extent. Xcode and Final Cut both run in multi-window yet effectively fullscreen mode, but act as IDEs for their respective workflows. In fact, this IDE mentality could be the new big divisive topic in the Mac world: Coda vs Textmate and Safari and CSSEdit and Versions and... Really, it's the same war as Vim vs Emacs (somewhat), just with GUIs. Does the application need to be full-screen and kitchen sink, or multi-window and able to integrate with others? I do agree, this could be a nuclear, apocalyptic scenario. But while photo, video and code workflows can be condensed nicely into one app, traditional mac workflows have been multi-window, multi-app in that most common tasks aren't IDE-oriented, and constructed from many different apps running on the Mac platform. But, to counter your point about app laziness: most mac developers came to the platform to make really good apps. If it was about just throwing something easy out there, they'd have run to Windows or enterprise apps already.