When you travel a lot but don't always use the same machine, the settings sync in Windows 8 is a huge timesaver. Windows 8 syncs the credentials for Wi-Fi hotspots and the passwords for websites from my trusty old HP EliteBook, I can walk into the usual office, hotel or airline lounge with a brand new Samsung Series 7 slate or Surface and be online without having to ask for the Wi-Fi password all over again. Same desktop background on all my PCs? Cute. My credentials everywhere? Hugely convenient.