I am running the developer preview and just in case i am both impressed and depressed.

My personal reviews :

1. Remove the CRAP green color or add options.
2. IE not working well at all, i can not multiquote or click on drop down search menu bar on KWWH header. Of course it should be fixed.
3. Chrome is not working i think on this at present nor installing.
4. Don't know how to close apps.

Pros :

1. Awesome light interface.
2. Truly good task manager, can't believe it lol.
3. So quick , so quick everything comes in a flash, i never say FF open and close so quick.
4. What an awesome OS to work on provided many things seems missing.

I was running windows 7 almost 2 months before it was officially launched.
And even to me this seems highly tech sided, i can't say about the normal users.

Seems to me like MS has some kind of contract with tech support companies coz once thing thing comes up in force, people will need to call tech support on questions like : where the hell is my start menu and programs menu.