>Microsoft is shipping a different look, but they have the option to switch back to the old way of doing things.
No they don't. Metro could be disabled in the Developer Preview, but it can't in the Consumer Preview. It remains to be seen how the final release will work.
(I've been using Windows 8 for a couple of weeks now; in many ways it's a great improvement over previous versions, but the moment you have to interact with Metro it feels like you're on a truck that just hit a wall. It's a horrifying blunder; I can't believe they seriously thought they could release a new OS with changes like this after seeing how Vista was received.)