As someone who likes to have a second monitor when I can, where are my wireless display tech for monitors? It would be awesome if all I had to do was turn on my

As someone who likes to have a second monitor when I can, where are my wireless display tech for monitors? It would be awesome if all I had to do was turn on my monitor and not have to deal with cables, but currently that is reality. Seriously though, I'm looking forward to cable-less future when it come to monitors.