As we know that Microsoft is going to release updated version of Windows 8, Windows 8.1 later this month. At present Microsoft will only launch preview version of Windows 8.1 and RTM version will be launched in September or October this year.
By introducing this version Microsoft wants to give best user experience to its users, Microsoft has made lots of customization in it and made it more user friendly.Microsoft has bring back its old Start button in Windows 8.1, they had made Start and Lock Screen more personalized.
If you are still not sure what you will get in upcoming Windows 8.1 then take a look at the video below released by Microsoft :-