The use case is that when I want to the living room to be in a comfortable mode, where the air-conditioning is on, nice music is being played, and the lights set to a relaxing tint, I can just switch to that mode with a single app or voice command.
The main party coordinating all the various devices is the SmartThings hub. For the video, I set up a virtual switch in SmartThings that would be used to activate all the other devices. As Amazon Echo has out of the box integration with SmartThings, I am able to trigger that virtual switch with a simple "Alexa, turn on Mood Setting".
Once the virtual switch is turned on, I configured 3 other devices that would run as a result. The Sonos Play 1 is activated to play the song that I want, the air conditioning is turned on by the Logitech Harmony Hub, and the LIFX bulb turns on the light to a comfortable color.
Latency is hardly noticeable, and the Sonos seems a bit slower only because of the nature of the song. This demonstration showcases the flexibility and extensive compatibility of the SmartThings hub, and how we can easily set up combinations such as this.