Stephan Tual, one of the creators of the DAO, stated on the DAO slack channel:
The DAO will be winded down completely and transformed into a simple contract where you can only withdraw. Its shutting down but as no ether was stolen and no ether was spent, nothing was lost.
Nothing lost at all , besides the credibility of the developers , and of the project in general , and also the large drop off in value....
... and the future value due to loss of credibility , but other than those things , nothing at all lost.