Consider that a reader is just as, if not more, likely to get to your page via an app like Twitter or Facebook, with its own chrome, than the built in browser. Those positioned elements are only taking up valuable screen space and replicating functionality the reader already has built-in. Simplify your pages, reduce overhead (both cognitive and bandwidth), prepare them to live outside of browser.
And yesterday, he tweeted from @_flickerfusion:
The lessons from Apple News are the same as Instant Articles: be lean, nimble, ready to publish everywhere.
Publishers, take note.