whatever i said is from common endusers perspective and not from YC news reader's(who are mostly techies) point of view - just like the way we switch our browser right now ... we will be able to do the same with the OS!! or even better, there will be multiple browser OS preinstalled, you pick what you want....
as far as h/w platform is concern it would be too early to make a call, we may think right now that intel will lead the market/platform as they now support both (PC & MAC) but i wont be surprised if there are new players... especially from taiwan and china!!!
And even if intel dominates the microprocessor market, I really wonder how would a common man will differentiate a MAC laptop with Lenovo's thinkpad because all they have installed is the same Browser-OS (chrome, safari etc.) on the same platform (intel), with the same specs(say 4GB RAM, 5 USB ports, 2HDMI, same display card.... etc.) and almost everything else is on the cloud .... i guess then it would be all about speed, power and exterior look/design of the laptop??!!!