While it seems cool, this doesn't solve anything. At best it just shifts trust onto Terminal. And really, there's nothing stopping a malicious VM owner to "fix"

While it seems cool, this doesn't solve anything. At best it just shifts trust onto Terminal. And really, there's nothing stopping a malicious VM owner to "fix" up things to a good looking state, then show off that snapshot, then revert and continue. A solid example to keep in mind is MtGox. How can we run something and know no invalid trades are added, no fake password resets processed, etc etc.