The new Prius will start with better batteries. There will be a lighter, smaller, higher density NiMH battery in order to both lighten the load on the Prius and allow for more space inside. Just like batteries, there will also be a new electric motor to be more power dense than the previous model; it will probably be both smaller and more powerful. Finally, an improved gasoline engine will have an improved thermal efficiency over the current model.
The new Prius will also be based on an all new platform called the Toyota New Global Architecture. It will have both better rigidity and a lower center of gravity in order to improve handling.
Another big development has to do with the plug-in hybrid version of the Prius. Toyota is developing a new wireless charging system that will be able to transfer power from an on-floor coil to an onboard coil. This will make charging the plug-in hybrid as easy as parking the car in the garage over the coil. The plug-in hybrid will also likely see an improved all-electric range over the existing model.
No official details have been announced from Toyota yet, but experts expect these new vehicles to land at Toyota showrooms sometime in 2015.
To find out more about the current Toyota Prius, or the other efficient hybrid and alternative fuel vehicles from Toyota (http://www.toyotaofmerrillville.com/