Fair enough and I can fully understand the feeling of wanting to try something different or just have something new.
Windows 7 is 5 years old but I don't think it shows its age at all though. I mean, the UI elements, Aero and so on are still modern looking unlike Windows Vista which has that colourful vibrancy to it and the performance is still great on a modern system so if it works well still then I'd never even consider upgrading it until absolutely necessary
oh I agree, Windows 7 for me is still the most user friendly and best used Microsoft OS. I know Microsoft didn't want to create just another Windows 7, but they could have done a much better job with 8.
Kernel Hibernation is spot on, as is the performance improvements, security updates and the like. However, its obvious they are trying to create some tight eco system with linking in tablets, phone, xbox etc etc.....the problem is it's all a bit rubbish....and, stinks of Microsoft. You can cover your face with make-up, but if your ugly your ugly.
What they should have done is taken 7, bolted on the 8 performance and security improvement and done the following:
left out metro
redesign windows updates
internet restore using pre-patched image (like apple does with mavericks)
integrate social media straight to desktop
integrate Skype and one drive straight to desktop
integrate MS app store straight to desktop in a sandbox env (think they are actually doing this with update 1)
Then create a new metro os for tablets and phones
What annoys me most about Microsoft at the minute
No consistency across any of their products (even websites do not follow a single design). How come google chrome works better on microsofts website than IE?
No £50 xbox media streamer. How on earth is that bringing consumers to the platform?
Two versions of IE? desktop mode and metro mode

No wonder joe public are confused.
Windows 8 for power users is slower than Windows 7. I've debated this, and proven using a VPN connection setup that 7 is 70% faster than 8. This is due to losing the desktop space when going to metro and back again. Plus once you lose metro, your on screen settings are gone so you have to navigate all the way back to find them.