It is now possible to damage your vehicle in a crash. A vehicle with a blown engine won't start. A vehicle with a busted transmission won't move. A vehicle with a flat tire won't move.
Your mechanic with a properly equipped garage can evaluate the damage to your vehicle, uninstall busted parts and install new parts.
Not yet, but coming: repairing damaged parts, other kinds of parts, integration with motorcycles (they aren't part of this), integrated damage in external vehicle look, coloring body panels.