There already is a hotel with Alexa Echo in every room: The Wynn Las Vegas, 4748 rooms with Amazon Echo.
From a year ago:
Siegler omitted there are Sonos brand speakers with Alexa,
and you can use the Fire TV Stick with Alexa, to ask any question, and the answer pops on your TV, from current sports score, etc., with Alexa speaking the same answer you could get on a Dot or Fire Tablet, or phone.
My Fire Phone now told me, when I hit Alexa, there are features for my new Dot that I haven't enabled, and gives a link to get more information.
I see, he's from GV so perhaps he's biased away from competitors to Alphabet.