Most probably already have heard about it:
http://www.omgchrome.com/packaged-ap...-os-dev-users/
http://betanews.com/2013/02/28/500px...pixels-future/
There are quite a few "real" apps for Chromebook available already.
Not relying on being online, working offline just fine.
And not working within the browser windows, but as a standalone window.
And you can differentiate in the chrome store. They are entitled "apps" whereas the former section is called "websites".
I don't have too much use for it, Chromebook Pixel always was intended to be my "always online" machine.
But it's a nice evolution, getting closer to a "real" OS.
BTW: I'm still using mine intensively. For me, this means something.