Paul Thurrott's SuperSite for Windows has probably the biggest analysis: his
Windows 7 Preview is in five parts, four of which have been posted so far. He says: "Clearly, Windows 7 is to Windows Vista as was Windows XP to Windows 2000. And that's true on a number of levels."
Active Win also goes to town, with more than 13,000 words on a single page. There, Andre Da Costa excitedly concludes:
It's safe to say I am overwhelmed, overjoyed and most of all excited about Windows 7. This is the release of Windows everybody has been waiting for, it's what Vista was meant to be and beyond that. Windows 7 puts the user first; it's about going back to the fundamentals of what an operating system must do. Managing and maintaining your PC is exceptionally seamless in Windows 7 and users will appreciate the tremendous improvements and advancements this update will offer on both existing and new hardware form factors in the future.
http://www.guardian.co.uk/technology/blog/2008/nov/02/windows7-beta-previews