The first step of this with haptics and simhub already exists and it can definitely enhance the information available through the brake pedal. However there is no doubt we could go a lot further if we had a pedal that was providing countering force via a motor, we could provide the detail of ABS through the pedals but also simulate whatever type of pedal we wanted from very soft to extremely hard purely from software. Initially it would just be easy to configure but you could absolutely see games setting up a profile for the pedal to simulate the car and providing a far more detailed and realistic feel for the pedal. Arguably a clutch could benefit too and it might be a better way to simulate it than a fixed bite point based on a mechanical design.
There are a couple of challenges to building one though, our feet are pretty strong and its going to be a challenge to get the force into the right direction to counter the amount of power we produce with out feet while also producing fidelity and its will be initially be only the shipped software supported and maybe from simhub for effects.
I like the idea if it can be made to work it could produce pedals with a lot more interesting differences for different cars.