[hackermom]

The idea is definitely good, but I think the "problem" it solves might be overrated - after all, if an app has unsaved content, it will ask you to verify your action, so you never really lose anything but a second or two of time restarting the application the few times you do this mistake, if at all.

[kbatten]

Not necessarily true. Often there is application state that you don't want to lose, which isn't saved. For example if you have open IM/IRC windows or if you have multiple opened Documents that you are reading that are saved.

Though I think a better way is just to save all state when quitting no matter what your application does.

[calloc]

Lion is definitely on the way to fixing this.

[gallerytungsten]

There's an important exception: browsers, particularly those that don't have an option for automatically restoring all tabs from the prior session. This may be a vanishing exception, but still a possibility.