Windows 8's tight integration with Microsoft's SkyDrive cloud service may be the best reason to upgrade to the new OS. Never used SkyDrive? You're not alone. Despite offering a generous 25 GB of free online storage, SkyDrive's poor integration with Windows and Microsoft Office has left it largely ignored--a potentially great service that didn't live up to its potential.
Windows 8 may change that. SkyDrive will become a key component of the new OS, with its own Metro-style desktop app for easy file management. Tighter app integration will allow you to use SkyDrive as you would a local hard disk.