As we have seen it here, yesterday a large part of the keynote of Microsoft, presented by Steven Sinofsky at the Professional Developers Conference, was dedicated to the pre-beta of Windows 7, successor of Windows Vista.  

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WOW (windows slogan )

I like the interface! It's really clean, but on the other side I think it will need a very very fast PC in order to support the graphics which are used (like Vista did too). However, the changes are done really well. They changed interfaces into Office 2007. I like that.