Microsoft is, in my opinion, squandering an opportunity to be the major industry player to disintermediate today's "cloud" and give control back to individuals, families, and friends. Because they think of managing local accounts from a 15-year old point of view clouded by overly-complicated Windows Domains, they are unwilling to conceive an interface for managing your family's accounts yourself in a secure manner. But it would be possible, and Microsoft should be the one major player saying: "We're going to provide you the tools to manage your information securely for yourself. Unlike Google and Apple, we don't want your information. It's yours and we value your privacy!"

It's #5 from my 2013 rant on Microsoft: http://tiamat.tsotech.com/microsoft