Great post. I think one of the most interesting aspects of this is payments.

Throughout the history of the web most services and content has been free to consumers and support with ad revenue. But on mobile consumers are much more willing to pay and it is almost completely frictionless.

I wonder if in the next few years we will start to see more and more apps using the subscription model. If Facebook was started today as a mobile first business would they charge for the app outright, charge $1 per month, or use in-app purchase to charge for extra features?

NB: I first posted this comment on the blog