'Back to basics' sounds good, but most people don't really want a truly basic OS. And Google is either high or lying through their teeth if they think making an OS more 'basic' will make it more secure. ESPECIALLY one designed from the start to run with the BROWSER as it's heart!!
'A new windowing system running on top of linux'. Can you say OSX (Tiger, Leopard, etc etc.), and any of a dozen Linux distros already out there? And, how does running a WINDOW GUI make an OS basic? These people have gone off in to never-never land, and believe it's a real world.
I use Google because it's the least bad search engine out there. Nothing else they've done has impressed me, and this doesn't either. In fact, it shocks me with disappointment in Google.