There will undoubtedly be improvements in battery technology for EVs but one of the biggest challenges right now still concerns the transmission. All current EVs have a tradition single motor coupled to your transmission which is often used to drive the wheels. Had the noteable feature of wheel motors, despite the fact that volvo enjoyed a concept in 2007 referred to as the ReCharge that was a diesel-electric hybrid. This solves the transmission problem because rather than having one large motor, there are instead four smaller ones, one built into each wheel hub. This removes each of the weight of your transmission and provides expanded possibilities for vehicle control. For instance all-wheel-drive vehicles become super easy to build and control after you start using wheel motors. Instead of all that nonsense with limited-slip diffs, torque-sensing couplings, clutch packs, speed sensors, hydraulics etc, you simply have four wheel motors that can each be monitored for slip. If one is slipping, the electrical system simply reduces or cuts power to that motor.
In a similar fashion, stability control might be implemented much the same way – as an alternative to braking an errant wheel as we do today with ABS-coupled traction control, inside a wheel motor solution, the wheel that needs to be brought into check could simply have the motor commence to act as a generator, inducing drag and slowing the wheel down like brakes do today. For that matter, 4-wheel regenerative braking would be a very efficient means of topping up battery charge on the move.