I've seen a lot of Smart Plugs for sale online like the ones below. 

The next logical step to me seems to have integrated plug sockets in the wall as the smart plugs are quite bulky. But I can't for the life of me find any... 

Do they exist? If so, where? If not, why?

[![Smart plug array](https://i.stack.imgur.com/xMI6o.jpg)](https://i.stack.imgur.com/xMI6o.jpg)