Apple should create a 'Migration Assistant' application for Windows.

When you buy a new Mac, and need to get all your data from your old machine onto your new one, if you're old machine is also a Mac, you can fire up Migration Assistant and everything is done for you.

It would be really useful if Apple created a Windows version of Migration Assistant that a user could install on their old PC to transfer their data (iTunes media, emails, bookmarks, contacts, photos, documents etc) onto their new Mac.