In this day of age, it's very practical to have a Windows 7 installation on your USB key, for many netbooks and devices don't come with CD/DVD drives anymore.
You don't need to be a developer, and IT employee or a manufacturer to be able to get the 90-days evaluation version of Windows 8 Enterprise and you don't need to use the torrents to get it as well.
Windows 8 has a very useful application to get driving directions from point A to point B and it works everywhere. In this lesson I will show you a simple example.