Woah, this pretty much describes my "perfect" file organization tool which I've been thinking about in the last months. I was thinking of combining it with revision support (every version of your file stored) together with Dropbox-like synchronization.
I think every version would be a bit much, especially on smaller drives if it had logarithmic diffs i.e. every change today. Every hour for the past week. Before that every day for the past month. etc. It would probably be more disk efficient for people with smallish SSDs, but everybodies "perfect" is different.
