And what are the dependencies? What is the lifetime of the VM? It says that Arc uses VirtualBox, does that mean I would need a full install of VirtualBox to use this?
I don't have a Mac, so I haven't tried out your demo yet, but ideally you should make this work like genymotion, using the existing VirualBox install in headless mode. This would also make a much quicker install option for existing vbox users. Hopefully you can avoid the mistake YouWave made of interfering with an existing vbox installs.
It will only work with OS X 10.7+ though.