Save me a seat at the table. I think these screenshots look like a nice update. This is timely to me because I was stuck in a meeting this week and looking at the presenter's projected Windows 7 desktop, and thinking of how ugly and unhelpful the current icon set is. Have you ever actually looked at the Outlook icon? It's a big "O" and a faint envelope in orange on a yellow background. Unless you've used it enough to associate that with Outlook, you wouldn't make the connection. The Mac Outlook icon is a lot simpler, nicer, and more visually obvious. The rest of his toolbar icons were the same: shapeless, indistinct, and unappealing. I like these new ones a lot more.
To the "change for change's sake!" Luddites: this isn't that. The Windows 8 Metro desktop abomination is that. This is a company updating its visual components to meet the expectations of the day. Everyone does this. Food labels change. Magazine layouts change. Car styling changes. Furniture colors change. Clothes change. Why do you think Windows icons should look the same for eternity? And spare me the "it's confusing!" whining - a file folder is still instantly recognizable as a file folder. Its look has evolved, but it's still the same basic shape and color.
Mark today on a calendar: I defended Windows's visual appearance. I never thought that would happen.