What are the advantages and contrasts of Windows 7 from Windows XP?

I am looking forward of having a new laptop. However, I am very much confuse of choosing an OS that has nice features and it should be user-friendly.
I am looking for some advantages of having Windows 7 rather than Windows XP.
Can anyone help me in giving such advantages and contrasts of having windows 7 rather than Windows XP?
Please I really need to have an idea of what OS will be more advance, so that I could do my stuffs very well.
