FYI, you can control anything with the Amazon echo using its SDK. I don't have the Echo yet, but I downloaded the SDK. Since my Raspberry Pis already control stuff, I will be able to use the Echo to tell them what to do.
I actually do have voice control using the Raspberry Pi and a USB microphone already, but it isn't very accurate, and can't tell who is speaking. The Echo should be able to tell who is talking and work out more precise commands "Turn the TV to Comedy Central!" would turn the satellite, hifi and TV on if they aren't already on, switch the hifi to TV if it isn't already there, and change the channel. The Raspberry Pi does this by mimicking the signals from the various remote controls thru a $0.10 IR LED. Better yet, the Echo (or the Pi) can ask "Dad is that ok?", and only my voice can approve the request!