I'm not clamoring for any Microsoft software for the last two decades, but the idea itself is interesting, like being able to catalog and look back at what I did at specific times in the past, or be able to query "What was the website where I saw X at?", would have been useful just last week for me when I was trying to find some document I read but didn't bookmark/download.
But I'd probably trust BP to not spill oil into our oceans again over Microsoft not having security/data leak issues.