Adobe's decision to move to the cloud was sound (in a business sense) for them.
Hopefully, the data that was stolen was encrypted and salted, as they maintain.
The loss of the source code, though is the more worrisome part of the event.
There isn't a computer around that doesn't have Adobe software on it (Reader, Flash...etc.). This will make many computers vulnerable to security hacks depending on what was stolen, and what's exploitable in it.
That part Adobe hasn't been very transparent about, and that's worrisome. Brace yourselves for zero day exploits.