I would love to see serious developer tools integrate the new file/state APIs creatively. - Will it be possible to populate the list of previous file versions

I would love to see serious developer tools integrate the new file/state APIs creatively. - Will it be possible to populate the list of previous file versions from another source, like a git or svn repo? - Could the application state API include a shell intelligently reopening itself and launching the development environment that was running before a restart? - Can applications read old versions of files edited in another application? E.g. could I tell Chrome to view a page in one tab, and in the next tab view the version of that page from a week ago to compare differences?