Casting Netflix on the latest Chromecast devices forces you to re-log in to your account on the TV every time you click that Cast button on your mobile. A minor problem for people with a small family and no friends. A big pain for those who cast from different accounts.

And a massive problem for me and one of our hardware solutions which remotely streams mutliple chromecast devices via a UDP directly in to different rooms in a hotel.
F*ck you Google TV, you insistent piece of crap, I'm going back to Chromecast Ultra.