Virt getting started guide chapters

Hello, I was looking over the wiki page outline for the virtualization getting started guide, and thought two things: 1. Do we need a chapter (3) on why someone should use virtualization 2. I think we should include a chapter about Docker I was thinking about Docker because to overcome the publican problems in Fedora22 I built a Fedora21 image with publican so I can build the guides. It occurred to me that it probably should be in the guide as well. Respectfully, -Glen