In its first 10 years, the iPhone will have sold at least 1.2 billion units, making it the most successful product of all time.
Look at this graph ↓.
The revenues from iOS product sales will reach $980 billion by middle of this year. In addition to hardware Apple also books iOS services revenues (including content) which have totaled more than $100 billion to date.
This means that iOS will have generated over $1 trillion in revenues for Apple sometime this year.
iOS users spend more and are more loyal than those on alternative platform thus qualifying the platform as “premium” and thus adding to its value in the eyes of developers, content producers and service providers.
As the install base of iOS increases and as users hire the devices to do more and spend more time with them the virtuous cycle of value creation will continue and accelerate.
This ↑. This is what iPhone (and by extension Apple) detractors don’t understand.
… Android was originally seen as the “good enough” iPhone, potentially disrupting it, it turns out to be the ersatz iPhone. Chances are higher that users will switch from Android to iPhone and not the other way. Again, the reasons have more to do with the ecosystem and quality of users (which are hard to measure) than with the hardware (which is easy to measure.)