Nothing new

I bought a remote controlled socket adaptor at Maplin over 2 years ago. They also do the packs of 4 and IIRC they're cheaper.

I even bought a 3 pack of these things from a garden centre last Christmas where they were being sold as the easy way to turn on/off tree lights when the plug was hidden behind the tree. Luckily for me the two remotes I now have were compatible and can be configured to work with the sockets from the other set using dip switches.

I will admit, these ones look nicer though........