Bruno Senna is Ayrton's nephew. Nicolas Prost is Alain Prost's son (and Alain is visible in some of the shots cheering on his son from the garage). There are a number of other close ties to F1 in both the car hardware and technology and many of the drivers.
Most of the limits on the cars are due to battery technology.
Most of the limits on the cars are due to battery technology.