In the case of Famo.us, the innovation has been to bypass the webkit render engine by writing a new, higher-performance engine.

FORBES: For Radical Innovation, Nature Loves A Vacuum

What you see in the diagram above is that the framework maintains the in and out points of the WebKit flow, but takes a detour in the middle using its own physics engine, render engine and rules framework to replace the native WebCore functions.

FORBES: Famo.us Cracks The Secret Of High-Performance Apps By Tapping Another Dimension

The idea that you could render in the browser but not get bottlenecked by webkit is the equivalen of Lugg removing the shaft from the jet engine.

FORBES: For Radical Innovation, Nature Loves A Vacuum