This year big question is : What Windows 7 has that Windows XP doesn't have ?
Personally I'm using Windows XP SP3 and I'm satisfied with it's performance , security , easy interface (you can customize it ) , it opens all known new programs that Windows 7 opens etc.
The main difference is the "New Taskbar"with Start Menu and also don't forget minimum system requirements :
1 GHz processor ,
1GB of RAM ,
DirectX 9 graphics device with 128 MB of graphics memory ,
16 GB of available disk space and DVD drive !!!
They say that Windows 7 is faster than Windows XP !!!
Windows XP SP3 minimum system requirements are :
•233 megahertz (MHz) processor
•64 MB of RAM
•Super VGA (800 x 600) or higher resolution
•2 GB of available hard disk space during installation
of course CD-ROM.
One thing I admit about Windows 7 : it's optimised for latest dual core CPU and quad core CPU which you have to buy the latest PC hehheheheh.
Money , Money , Money it's not funny !!!
Also in both of them you have to buy or "borrow" from warez sites , a very good antivirus and a spyware remover for protection !!!
In functionality both are the same .
For example watch the computers that KONAMI uses for creation of Pro Evolution 2010 :
http://www.youtube.com/watch?v=sCNlC_3SL5EWhy they don't use Windows Vista or Windows 7 for creation of Pro Evolution 2010 ?
Will Windows 7 fail like Windows Vista ?
Do you remember the time when Microsoft advertised Windows Vista but after 1 year all Vista users where disappointed ?
Remember Windows Vista as a lesson.

Tell me : which is faster , better and secure ?
Tell us your opinions and discuss so that we can make clear for other members which Windows Edition is better for them.