So it’s very likely that the total Apple user base is between 900 and 1 billion. If it’s not 1 billion now then it’s very likely it will be 1 billion within 12 months.

Write Horace Dediu

This is a big milestone. You can technically understand why iMessage doesn’t need to come to Android. It’s Apple’s apple only social network and has a base of 1B potentials.

What are the other potential implications?