Disposable VMs will be lightweight VMs that can be created and booted in a very short time, say < 1s. They can be used to host only one application, e.g. a PDF viewer, or a Media Player. The ultimate goal would be to make Qubes OS look like a regular OS like Linux or Windows, Mac or Windows. Qubes Beta 1 is scheduled for the end of the summer, with basic support for VMs planned for sometime at the holidays."] Source: http://theinvisiblethings.blogspot.com/2010/06/disposable-vms.html