No, it's actually streaming.
As the link says, they run managed vm's and stream it.
As someone else says, VNC is really old technology. We can do better.
Nothing in this discussion indicates that anyone knows what streaming technology they're using. However of course there are better and worse technology. Streaming RDP from a Windows box a thousand miles away, for instance, is a world more enjoyable and usable than VNCing to the Mac box connected via a 1Gbps twisted pair. App level virtualization through the same, interacting and engaging with the rest of your desktop, is close to magical.
