I was only able to stay for the first half of this workshop so it would be great if some other folks who attend chime in as well.
Here is the DH Box website: http://dhbox.org/
Right now it seems as if the tool is particularly useful for teaching DH tools in the classroom. For example if you try to teach a workshop on Omeka (an online catalog/exhibition tool) and you are using rented lap tops or a computer lab where you do not have the ability to download software, DH box will allow you to use Omeka through a browser. DH box is still a bit new and requires some comfort with command line interactions. There is a lot of documentation online. This is what I gathered I hope other friends will add more comments about what they learned.