Microsoft Office doesn't want you to be alone. Productivity should be a shared experience, apparently, and now the vaunted Office suite wants to integrate your social circles into all your spreadsheets, Word docs, and presentation decks. Imagine your co-workers, gathered virtually around your desk, showing you how to get more from Office, and helping you improve your work. That's the next-gen Office that Microsoft envisions, and it's a trick that none of Microsoft's competitors--Google and all the other freebie upstarts--have yet to attempt.