Apple's newest flagships arrive on Friday and the first reviews are already out. How does the iPhone XS evolve the platform?

Evolve being the key word, of course: The iPhone XS and its larger but otherwise identical XS Max sibling are the epitome of an "S" year for the iPhone. That is, they offer tons of minor refinements over last year's iPhone X, but no major new features. Looked at more broadly, they are to hardware what iOS 12 is to software.