You know and love sandboxing for source code and being able to throw away work or commit it at the end of the day. Now take that concept back a level to virtual machines and add a side of provisioning. This is vagrant.
Have a user have a certain setup that you don't want to replicate on your work machine? Vagrant can help you get that environment setup and allow you to replicate bugs quickly.
Having a virtual sandbox may change the way you test your end product. If you are already virtualized, this session will show you ways to enhance your day to day development. If you are not virtualized, this session may rock your world in what's possible and what will be mainstream coming in the next few years. Don't miss out on this opportunity to see it ahead of time and get ahead of the curve!