Oh! Snapshot will be absolute useful! More so — it will be decision-making feature for some hard-corporate and healthcare clients, where many contents are legal-info, supervised formulations etc. That is, where every change have multiple approvement stages, but nevertheless often ends up in restoring older content versions. Especially when multiple content-managers from different departments have hands on admin, with usual corporate chaos.
Some of such clients still preferer old Typo3 instead of "some other good cms out there" solely based on "page versions" feature.
Vote up for Snapshots!