Samsung TV's "bricked"
I had thought that, the Australians have them and call them Road
Trains. Like you, I cannot see any advantage of the proposed system
over the one already tried and tested.
I wouldn't expect the fuel savings to be /that/ much for a convoy of three.
The drivers will get used to just sitting there, doing nothing, and have
difficulty remaining alert enough to take over at a moment's notice when
a MegaBus overtakes and interferes with the convoy's WiFi hotspot.