Not to worry, Andre DaCosta prepared a quick guide with side-by-side image comparisons to help new Windows 7 users become familiar with some of the changes and benefits of Windows 7. See Andre's article in For the 'former' Windows XP User - Welcome to Windows 7!
(The Windows XP --> Windows 7 image was fun to create with SmartArt Tools in Microsoft Office 2010, Technical Preview.)
Remember - "A day without laughter is a day wasted."
May the wind sing to you and the sun rise in your heart...