Ironically more Servo features could actually make this work better than the XUL version, such as supporting GL/CSS 3 transforms on the <webbrowser> components.

Ironically more Servo features could actually make this work better than the XUL version, such as supporting GL/CSS 3 transforms on the <webbrowser> components. Take a look at Servo's current UI for how this could work. Of course this doesn't help much with Quantum in its current state.