USING Windows 7 and want to expirence the feeling of Windows 8 on to Windows 7 OS
Just check out the post

Windows 8 is almost same as Windows 7 just minor changes have been made in the appearence and some features has been changed.

The glossy and crystal look of windows 7 has been changed in windows 8 (in windows 8 it has been kept clear and transparent)
As you know the start screen has been changed in windows 8 which is more attractive

The performance wise windows 8 is good
I would recommend go for windows 8 OS it is awesome
and now windows 8.1 is soon going to release in my blog there is a post which will give the direct link to download 8.1 preview

Or if you have a doubt you cannot cope with windows 8 you can change the look of windows 7 to windows 8 and see if it manages with you or not

In fact the Vista , XP user can use this method to transform into windows 8

Windows 8 transformation pack- This free transformation pack will change our Windows user interface to Windows 8.

Windows 8 Transformation Pack 5.0 allows to change the below mentioned things to Windows 8 user interface.

Boot Screen
Login Screen 
Task Bar
Themes
Wallpapers
Icon
Sounds
Fonts, Etc....

Download this transformation pack from here

Download this windows 8 transformation pack
AND
Enjoy the windows 8 interface on to your PC....!!!