This article is more about using the linear electrical generator on the piston than it is the configuration of the power train. No vehicles on the road today have anything similar to what is discussed in the article.

Also, I'm not sure about the current model, but there was a bunch of kerfuffle over the Volt not really being a strict electric hybrid:

http://www.plugincars.com/exclusive-chevrolet-volt-chief-eng...

Some of the time, at least in the edition discussed there, energy from the engine goes to the wheels without ever becoming electricity. Maybe they changed it in later models (but I sort of doubt it, the capability is there because it can be the most efficient way to use the engine).