[jradd]

To me the most purposeful usage would be for custom environment deployment in the same way I might use Chef or Puppet. That is far from the intended purpose of Linux Containers, and Docker may not be standardized application of LXC, but earns many points for me with its usage of git and if you are rolling your own webapps in troves and have limited resources it is nice to compartmentalize/modularize/automate your dev/deployment stacks. Especially when you are working with different clients that all have slightly different dev stack requirements it is nice to share resources while remaining isolated.

edit: I have not used containers with amazon web services but it is really nice to have on my VPS as virtualization and even paravirtualization are not typically an option.