The database may well have been encrypted, it's impossible to know. Obviously if you hack the database and content servers, you have access to the encryption key as well. So no, if the data was encrypted or not would not have made any difference in this case as the hackers had access to everything.

Security is all-in. A checkbox like 'encrypted the database' is not any additional security by itself and is not a gauge to use in who to give data to.

I think it's much more likely that people will take additional precautions for themselves. Things like multiple email addresses, one-time-use credit card numbers, and VPNs will (very) slowly grow because of this.