Was this article really necessary? Do you assume that Windows users are so stupid, they don't know how to copy a folder from one computer to another? All they have to do is hold Option (Alt on Windows) when they launch iTunes and pick the library file from the iTunes folder that they transferred to their new computer.
Most average users have wifi, not Ethernet; they don't want cables in the way. If they have computers in more than one room of the house, they're certainly not going to run cables. (Only power users have Ethernet cables running through their walls.)
Why is this article necessary? Because it's an incredibly common question, and because, if you search for the question on Google, you'll only find outdated articles that talk about having to manually change file paths in the iTunes library.xml file. With iTunes 9, this move became easy to perform; before that, it was a bear.
Kirk, if the average user can't figure out how to copy a folder from one location to another, how to expect them to set up a Wifi network? If the computer is in the same room as the high speed modem, I can guarantee you it is connected via Ethernet. iTunes has always had the Option/Alt feature for picking a new library file. Why didn't you discuss that in your article? That is the easiest method for choosing a new iTunes library.