Finally, Microsoft announced the official release dates of Windows 7; leaving behind unsolved puzzles are “price list” (of course, wouldn’t be revealed publicly until close to the on-sale dates), and the other missing detail is the exact breakdown of features in each edition. Every edition of Windows 7 contains all features of the previous edition, eliminating artificial divisions between consumer and business features. That makes the Anytime Upgrade strategy very clean and easy. Ed Bott has installed all the five version from RC build and then tallied up which features were in each edition, trying out each one to see unexpected behavior.

Full Article: Ed Bott