A few days ago I mentioned the href="http://garrys-brain.blogspot.com/2006/11/windows-vista-new-start-menu.html">Windows Start Menu mess. I simply wasn't impressed by it (you can also see the link to the Joel on Software blog post about it).
Apparently 24 developers got their hands dirty working on this, and it still turned out the way it has. I still look at the menu that pops up with the restart, etc. and wonder who let it out the door as it is a simple pop-up menu, not really revolutionary, and it doesn't even have associated icons.
All I can say about the turning off scenario is most people know what to do with a TV or DVD player, why is not that simple?