The mainstream has had little reason to care that Android gives developers much more customization freedom than iOS. But if Facebook's fabled Android homescreen is a hit, the stubbornness of Apple's closed mobile platform could be framed as a drawback after years of its cohesive design and ease being seen as assets.
Cheapness and handset/carrier choice are two of the biggest factors convincing people to pick up Android phones today. There’s its premier integration of Google's app suite and the "rebel without an iPhone" attitude too. But Android's flexibility for app developers has been more of a selling point for geeks and early adopters than for the average Joe.