Personally, I'll pass, but this is a nice change of policy for Microsoft. I just got a new machine with Windows 7 Professional and it does everything I need, although it also included a full Windows 8.1 install disk. If I ever do decide to upgrade, I would probably skip directly to Windows 10 though.
http://www.macrumors.com/2015/01/21/microsoft-windows-10-intro/
http://www.macrumors.com/2015/01/21/microsoft-windows-10-intro/
In an effort to get its users to adopt Windows 10, Microsoft is planning to distribute Windows 10 to Windows 8.1 and Windows 7 users at no cost for the first year, which is an unprecedented move for the Washington-based company. Unlike Apple, Microsoft has never offered Windows for free, but Apple's success getting the majority of its users on the same operating system has likely inspired Microsoft to make the same effort.