I think it means that there are less steps between HTML code and instructions. Less layers of abstractions, no crossplatform compromises - straight from HTML to DirectWhatever. I don't understand the controversy, it kinda makes sense to call it native when it is optimized for a single platform. Similarly to running x64 code natively and .net, java or VB6 running non-natively through abstractions.
Didn't they demo it running on ARM? Is running a browser on the various ARM SoCs and the various combination of x86 and GPU really a single platform just because they all run Windows 7?
