I can't really see the use of this -- though I know it will be super-useful to others. Although, if I can get a new HDTV that has HomeKit connectivity, maybe I can.
"Siri, I'd like to watch a Blu-Ray movie now."
"OK, Aaron. Turning on your TV and Blu-Ray player. I'm also shutting down the lights and putting Cassie [my iPhone] on vibrate."
"Thanks Siri. I love you."
"Aww, Aaron. You shouldn't have."
Umm ... OK, forget those last two lines.