Well, we didn't mean to re-invent the wheel, of course... In fact, LTSP is a fundamental part of VDD. The innovation is in the way existing technologies are used together. The aim of VDD is to project virtual Operating Systems instances on thin clients. Unlike LTSP-only based architectures, offering only the host operating system to thin clients, VDD uses virtualized guest systems like sandboxes to prevent users from breaking into the central server. The isolation conditions produce an high security level both for the user and the overall system. On top of that, several different operating systems can be projected on the same thin client on demand.