some people may not like the abnormally thick bars like 7 taskbar and ribbons. We have to remember that.
You do know the big Taskbar can be made thinner right?
-.-
It can be made thinner, but end users will struggle with the fact that they have to actually right click on it and change it, not just talk to the computer and make it do it itself.
By the way, eye candy changes are also involved in the fact that Aero is not rendered with DWM anymore, now it uses DirectX. It makes things faster for the user. There is also key changes in the start menu, login screen, and taskbar. For example, the start menu orb is now animated and there is a different start menu interface background. There is also the fact that Aero looks a bit better now, as Microsoft was trying to improve it, for there were still complaints. One key thing is that the titlebar is still transparent after being maximized, the thing that we used to have to use VistaGlazz to make that happen. There is also the simple color changes all around Windows 7.
The bottom line: There is alot to look forward to in Se7en, and there is still things yet to come.