Great points, thanks. I like extending the thought experiment to real world objects like toilets, because they too have 'user interfaces', even if we don't imme

Great points, thanks. I like extending the thought experiment to real world objects like toilets, because they too have 'user interfaces', even if we don't immediately relate them to computer operating systems. This also reminds me of something Neil Gaiman said, which is really a second hand quote from Douglas Adams: From: http://readingagency.org.uk/news/blog/neil-gaiman-lecture-in-full.html http://readingagency.org.uk/news/blog/neil-gaiman-lecture-in... "I do not believe that all books will or should migrate onto screens: as Douglas Adams once pointed out to me, over twenty years before the kindle turned up, a physical book is like a shark. Sharks are old: there were sharks in the ocean before the dinosaurs. And the reason there are still sharks around is that sharks are better at being sharks than anything else is. Physical books are tough, hard to destroy, bath-resistant, solar operated, feel good in your hand: they are good at being books, and there will always be a place for them. They belong in libraries, just as libraries have already become places you can go to get access to ebooks, and audiobooks and DVDs and web content." When we arrive at good design, it can be surprisingly resilient.