You also get a certain amount of programmability, thanks to Logitech's Activities. If you say "Alexa, turn on my evening activity," the bot will trigger a prearranged sequence that can involve entertainment as well as home automation devices. For instance, it can dim the lights, lower your blinds, adjust the temperature, flip on the TV and load up HBO Now or Netflix -- all in one sequence.
Voice control is already available for smart TVs and AV devices by LG, Samsung, Google and other manufacturers. However, Logitech's Harmony Hub works with just about every home entertainment device, along with smart home products like the Nest and Philips Hue lights. That might make it the simplest way to get voice commands to your home entertainment system and avoid any IFTTT-type programming. Alexa support comes to the US sometime this week and to the UK "in the coming months."