Take a look at the success of companies like Netflix. They are not charging you a micropayment for every
minute of content that you consume, but rather charge a flat monthly fee.
I highly doubt that Netflix would be more successful if they would abandon their current business model.
Netflix's business model is to borrow loads of money, then charge users less than their costs. They never made any profit on streaming; they're in huge, ever increasing debt.
(the idea is to establish themselves in the streaming marketplace, then massively ramp up the subscription fees later)
There's no reason why a Netflix-like company wouldn't add pay-per-view to their model, but only when they're sufficiently dominant in the overall pay-TV market (i.e. once they've eclipsed cable providers altogether, and once their customers feel reliant on their service)