Trying to get my head around what it can do at the moment, but I have 4x Smart Plugs on order and I have already got it 'talking' to the TV, speaking the time, weather etc...
I have put Alexa on my Iphone and managed to spook SWMBO but turning the living room TV on whilst she was alone in the house, me out shopping
I have also put Alexa on my Laptop can get it to respond to her name, though not control anything. In Smart Home > Devices, it lists my Fire Stick, Box, Cube and TV, but all are marked 'Currently not accessible from your PC'.