Video also requires sound, but I also hope that in the future there will be less reasons to even want to do that. Why not just stream that Video to the device then? (I understand there are reasons today like lack of flash on iOS, but it just seems silly.) So really I am depressed by the state of VNC/lack of successors. There is much room for innovation and I just doubt that anything can be solved with a VM. Better solutions in the OS would work in a VM and native. "It's up for disruption", as they say here.