Hopefully it will be significantly better than the competition and it needs to be, but it's the principle of the thing, you shouldn't have to give up your browsing habits to have a good browsing experience.
57 is the first release with this new tech in it, expect more technology to be ported from Servo, and for the current tech to be refined further in future releases.
RE: Firefox Rebirth: Rust, Servo and Project Quantum