Not the GUI though, but how much faster it boots compared to Win7.
Since Win8 is that much fatter than Win7, i couldn't see how this should be possible and thought, people see what they want to see.
Now i stumbled about some info 'hidden away' in the MSDN, that rehabilitates my friends.
So not only enters Win8 hibernation, when one clicks on shutdown.
In Windows 8, the default shutdown behavior puts the system into hybrid shutdown (S4) and all devices are put into D3.
Note that in Windows 8, hybrid shutdown (S4) stops user sessions but the contents of kernel sessions are written to hard disk. This enables faster boot.
It even takes the time to end the user session, so the layman can not notice, that Win8 went into hibernation instead of shutdown.
Just told this to two friends and they weren't too happy to know, that they paid good money for a feature they already had.
Maybe this helps you or one of your friends to save some money on a pointless investment.