WR doesn't help much with DOM update related issues, WR comes into play after that, when it's pixel time. WR is pushing the envelope for creative (ab)use of DOM

WR doesn't help much with DOM update related issues, WR comes into play after that, when it's pixel time. WR is pushing the envelope for creative (ab)use of DOM elements as graphics primitives, like in that spinning cubes demo :) but on a more serious note, leveraging the GPU makes a lot of sense because it's been sitting there mostly unused (only used for layer compositing) when browsing, and it's more efficient at graphics operations. That said, Servo itself has a fresh DOM implementation and I think there was work on making it really fast.