The first "spin off" or GM vehicle to use the Volt's tecnology is the 2016 Chevy Malibu Hybrid. GM will use a similar version of the 5ET40 electric transaxle but with a larger 1.8 L I4 gas engine, and a small 1.5 kWh air-cooled battery pack under the trunk (near the gas tank). It is not a plug-in due to the smaller battery, but it can run up to 55 MPH on electricity (range isn't known but I estimate about three miles) until the charge ends and the engine takes over. Here is more: http://www.caranddriver.com/news/2016-chevrolet-malibu-hybrid-photos-and-info-news
Since the GM regen system is designed into the transaxle, the Hybrid Malibu can give up to 47 MPG under average driving (this is a GM estimate). City driving is where the MPG will get better. The engine will run more often because it isn't a "range extender" as in the Gen 2 Volt. But I bet someone will add another battery pack and a "plug" to the Hybrid Malibu later and become a new five-seat PHEV sedan.
The next "spin off" is a true PHEV, which is the 2016 Cadillac CT6 Hybrid, and I leave it here to let anyone do their own data searches on the CT6 Hybrid.
The Chevy Bolt will not need this transaxle, since it will not use a gas engine and need not balance torque and speed with the engine. I believe (and many others also) that the Bolt will use an advanced version of the Chevy Spark's simple drivetrain (one motor and one planetary gearset) and a larger liquid-cooled battery. This is why a BEV is the simplist vehicle to own and maintain.