OK, this is nothing new but just a construction management need: will Revit be able to track the changes as the MS Word do in the future? I'm not talking about the simple log of who made what changes and when edited the Revit file but rather the actual model modifications that are reflected all views in the model.

How Used:
Clearly, who made what change to the model is a critical issue in the IPD and BIM-centric legal documentation process. If we could track such revisions through this "track-change" command, things might become easier: the party who made the changes will be held liable. Of course there are something more, but just curious.

Feature Affinity:
Red-line the modification of the model in parallel with the history log. Make the "Track-Change" command under "Manage" Tab.