I could post more than a link ;-P
But when I posted these a was rather busy, but thought a would post anyway.
I like the look new look personally, but ive not got round to trying it so my judgement would be based on what other people said.
I did learn in the Linux world its always best to be one step behind everything as the bug's tend to get fixed by the new adopters, not people like me who wait for it to be fixed.
Did you want more info in all the post's a make?
Plasma is the new desktop shell. Plasma provides a panel, a menu and other intuitive means to interact with the desktop and applications.
KWin, KDE's proven window manager, now supports advanced compositing features. Hardware accelerated painting takes care of a smoother and more intuitive interaction with windows.
Oxygen is the KDE 4.0 artwork. Oxygen provides a consistent, easy on the eye and beautiful artwork concept.
Is the main changes to the desktop. Or at least the GUI side of things.