> if you want to create a document, double click on its corresponding stationery stack and a new document is created. No need to find open Excel (or LisaCalc

This is a cool idea, but not really as practical, at least, not in the way it's presented here. To create a document, you first have to have an existing template of that type. What happens if you delete all of your templates? Even in our small demo environment here, it's such an obvious flaw that the author keeps templates on a RAMdisk. But even without that problem, you have to know where your templates are saved. I was surprised to find a drawing app.

One way to potentially fix this is to just allow document creation from the global File menu. File > New > LisaType Paper. Of course, if Lisa had been successful, this would break down, too. Imagine a menu with LisaType Paper, LisaCalc Spreadsheet, Lotus Spreadsheet, Lotus Document, etc, etc.

But it is a very elegant system, and I wish we could have seen a world where this desktop metaphor survived, so we could see how those problems would have been solved.