Microsoft attempts copying Ubuntu Functionality
According to this article the latest product from Redmond has a functionality similar to one that has been existing in Ubuntu for years.
It seems what when you have a testversion up and running you can use that upgrade to a full version while not having to pay for the full license. Ubuntu has this in place with their Live CD's for ages. Still a big difference between both products is that for the product from Redmond you have to pay real money, where as Ubuntu gives you the same or better functionality for free.