Thank you so much, raftr, for pointing us to the Ars Technica review. The URL you gave us, and the page following that one, are the most informative and educational pieces I have seen on this topic since this thread began. As one who has been among the most vocal in this discussion about the disappearance of Save As, I will be the first to stand up and say that the Ars Technica article opened my eyes and mind to a better understanding of the new auto-save features in Lion.
Having said that, I will also add that I am not yet convinced that ALL work on a Mac necessarily resembles work on a mobile device. I am an active user of the Adobe Creative Suite, for example, where Save As is even more fundamental to the iterative design process in programs like Illustrator and Photoshop that have for many years supported multiple levels of UNDO rather than redundant document storage. With an illustration, it would be exceedingly difficult to compare all the prior auto-saved versions to identify tiny design differences in color, position, size, etc. - it's simply not the same thing as looking at words or paragraphs of text. Indeed, I think the same argument could be made for a spread sheet with cells that contain formula definitions that are not visible to the "naked eye" when comparing previous versions.
I have also not dropped my opinion about the cost consequences for administrators of workgroups. The brightest among them might comprehend and benefit from the Ars Technica literature and borrow from it for tutorials that help their users benefit from the new features. But in the meantime, the chaotic frustration is an expensive burden.
I rather doubt that Apple would scheme to do all this as a way of driving up cloud-based storage revenue. They make enough money from real product sales to not have such an ulterior motive. But I do resent the way my hard drive becomes unnecessarily swollen with documents I never asked for.