One feature about Word 2007 that I really like is the improved text rendering. Take a look at this picture:
The text on the left is in Word 2007. The text on the right is standard ClearType text, in WordPad. Now, the small text (Calibri 11pt) looks great in both apps. The spacing is a little different, but both look fine. (Word is optimized for both on-screen and print views, and WordPad is solely meant for on-screen reading.) But, the big text looks much better in Word. The reason is that Word turns off ClearType (subpixel antialiasing) for big text. I don't know the exact criteria, and it may differ by font, but the difference is obvious. (You thought I was going to say "clear"...) The text in Word looks much nicer and smoother, and the text in WordPad looks clunky and barely antialiased at all. I love it.