Windows 10 isn't for all of us, but for each of us. Microsoft is planning to launch Windows 10 in coming year. But they are still working on it and it will take some time for them to launch it. Though there is a Preview of Windows 10. From the preview it is easy to guess that Windows 10 is going to have awesome features in it. More interestingly its for both PCs and PHONES. If you are a developer and very much interested in it and also want to be a part of it then you can join the Windows Insider Program , and develop Apps and Games for windows. It is not advices that you use the preview on your primary device because it is still in the development process and you can face some troubles using it . I recommend you to visit Microsoft's website for more information. IMPORTANT : If you are not a developer or IT pro. please ignore this program it is not for you.