Please post what the term 'future proof' means?
There is little reason to move from Windows 7 to Windows 8.
If there is an equal choice between the two from scratch, sure, go Windows 8 - but move away from Windows 7? You're good until 2020 with Windows 7. By that time there'll be other more advanced Windows operating systems to move to.
If it is free, then yes, if you don't mind spending time to upgrade, for minor gains. But I wouldn't invest in a Windows 7 to 8 move.