I think you make some relatively naive statements here. Market share explains a lot. The market speaks for itself and obviously the masses have thus far chosen the iPad as the media consumption device of choice. As such, how can you not compare Apple products to Google products? I'm no iOS fan, but I certainly see why a ton of friends and family use the iPhone and iPad and really enjoy it. What are the top tasks performed on any of these devices anyway? Checking facebook, pinterest, some email, looking at photos, browsing the daily news and shopping, along with some games. Any tablet does that with relative ease, so obviously the user experience of iOS has been more appealing to the masses to this point. I don't care for it and don't really have much use for a tablet in general given that my EVO LTE does nearly everything I need that I don't use my laptop for during the day. I spend a ton of time on my laptop for typical business work that combines consumption with document creation. However, tons of people don't spend much time on a laptop or desktop and can get by with a tablet for most of their consumption-based electronics use. For a consumption-based user, an iPad is pretty much all they need. If it comes across to the user as being easier to use and reliable, then it should succeed. See Honda and Toyota, for example. I don't get the children's book vs. novel analogy. And the iPhone became very popular before the recent move to giant Android phones, so it's popularity isn't so much related to big or small size.
I really don't see the Nexus Q appealing to many other than hardcore music fans committed to Android. Like me, you probably already know a lot of friends who are audiophiles that use iOS with Sonos or something else. I don't see them leaving that ecosystem for the Q.
I'd be interested in seeing a breakdown of Android growth to see if much of the high end superphones (GNexus, One X, EVO LTE, SG3) is turnover from prior high end Android phones like me (prior EVO 4G, or Nexus One/S, SG2, Droid, etc) vs. lower end entry model Androids. Is a lot of the Android growth people moving from feature phones to entry level Androids while those of us who like to super spec phones are replacing them at a high rate as the new ones come out?
Just some thoughts on where Android is going in the overall market.