While I don't disagree with the "Quality product + good price + industry head start + robust and lucrative developer platform = dominant market position" line, I do think you should add "amazing marketing" to it.

If Apple's marketing were not key to its business why would they have spent over $1 billion on iPhone and iPad marketing since launching the devices (Google it)? Have you spoken with a teenager lately? Every single one of my younger siblings (1 in middle school, 2 in highschool) have an iPhone. They have an iPhone because their friends all have iPhones, because it's cool to have iPhones. They don't care about anything else.

So again, while your points are solid, discounting marketing all-together is very silly.