Terry Myerson, the head of the Microsoft Windows division, has confirmed that all Windows 7, Windows 8.1 and Windows Phone 8.1 users, will get a free upgrade to Windows 10, if they choose to upgrade within the first year. This also will allow that device to get all updates from Microsoft, until the system life time expires.
Windows 10 aims to bridge the gap between devices, and deliver one universal experience. This allows many recent devices, to join the Windows 10 network, and help build their vision.
Make sure to watch the Windows 10 Story at http://news.microsoft.com/windows10story/
