In https://air.mozilla.org/bay-area-rust-meetup-february-2016/ ,

- At 03:00: pcwalton explains how this experiment leans on the GPU-ization of our Intel CPUs since Haswell.

- At 14:50: slide says "WebRender supports OpenGL ES 2.1 and OpenGL 3.x"

- "Benchmarks" at 26:00 running on his macbook, which may fit what you are looking for

TL;DR, yes this early work is for "integrated graphics such as those in normal laptops". Or try it yourself on your laptop with a nightly build: http://blog.servo.org/2016/06/30/servo-nightlies/

It works awesomely on both integrated and discrete graphics for me. IIRC Patrick and Glenn, the people who wrote webrender, by default use integrated graphics anyway (at least one of them does).

Software rendering makes it choke sometimes (other times it works surprisingly smoothly, but it depends on the load), but that is to be expected :)