There is a great summary article over at the official Microsoft blog, this covers the latest Windows 8.1 information, Xbox One design information and some data on how quick Office 365 reached 1 million subscribers! It makes for a good read, particularly late on a Friday afternoon;

http://blogs.technet.com/b/microsoft_blog/archive/2013/05/31/weekend-reading-may-31st-edition-a-first-glimpse-of-windows-8-1-and-the-design-behind-xbox-one.aspx