However, it would be nice if you could tell Siri to play an episode of a show on a specific TV, but I think they would want you to have an Apple TV for every TV in your home, not just one to control all of the TVs.
"Hey Siri" on the Mac would be good. So would more interaction between devices - so I could set up an alarm on one particular device from any other device.
Cloud things are still clumsy from that POV. A lot more could be integrated.
My biggest (minor) annoyance is not being able to toggle switches.
I can say "Alexa, lights on" and "Alexa, lights off".
But I can't just say "Alexa, lights" and have the app read the current state and flip it - which is annoying because it would be efficient and useful, but also because it's so close, and yet so far, from living in a Star Trek TNG episode.
I've got a bad case of Apple lock in – Apple TV, iPhone, iPad, MacBooks. Saying, to my phone, "Play The Walking Dead on the TV" brings up TWD in the TV app (iOS 10.2, I haven't been paying attention, this is possibly beta track) which prompts me to start watching it... but it then plays on the phone. I can cast it to the TV, but I can't hand it off to the TV.
Maybe that's precisely how most people would expect and want it to work, but it seems unintuitive to me.