I downloaded 8.0 on top of my 7.0 and I assume all files were replaced.
It seems my system is a bit faster.
I do notice a difference when my desktop is coming up. Before, all the icons on the desktop would get their color but not all at one time, a few here and there until it was done. Now when my desktop opens all icons are already their proper shade.
Any of this coincidence or is IE 8.0 making some difference?