That has always been my impression of Google's multi-OS strategy - Chrome OS is the "pure" operating system, where Google gets to say NO to as much as they want and just give users the features they think users need ChromeOS has a vision (even if it is an ever-changing vision), and it's up to the users to conform. Android is the forgiving operating system, it's where the engineers build the features users or OEMs are asking for rather than the features google is asking for.