Well, it's good that they were caught, but embarrassing to the camera vendor and the MPD that the cameras and computers were hacked.
Some of these cameras have operational lives of like 10 years, meaning even if perfectly secure firmware were released today, the cameras in the wild which haven't received updates would remain a vulnerable part of the infrastructure for quite some time.
BTW, they're basically little computers - like Raspberry Pi's - so compromised cameras can actually be used in bot nets and as stepping stones to attack or swamp other elements of physical security infrastructure.