Okay, that was... unexpected.
Frankly, I was bored with the episode up until Cameron showed up -- and I was confused to the extent that I thought the episode was trying to imply that both Cameron and Stacy were dead. Obviously, they weren't, but the rules the episode seemed to be playing by suggested that they were. I liked seeing Andre Braugher again, even if it was just for a minute. The absence of Cuddy was... understandable.
It managed to be a little bit "The Final Problem" (with House having a public death) and a little bit "His Last Bow" (with House and Wilson going off and retiring together).