While the article said about "holiday PC lineup", is the upcoming machines confirmed for Windows machines?
Pretty much all the major PC makers have new laptops they announced at trade shows in July/Aug/Sept that they've been holding back until November. They'll be shipping with Windows 8.1 which they couldn't do if they put them on shelves in the summer.
Wouldn't be so sure. Acer has a Haswell Chromebook out already, and if Intel really wants to stave off ARM, they'll come down...
And while Chromebooks work with low powered CPUs, they're better with a faster CPU. WebGL is getting real, Google already has Nacl in the browser (examples are 'From Dust', 'Bastion'), and as web apps become more 'native-like', the extra power will be appreciated.