I see bright future fot both use cases. I mean you already just have to look in our gambling section how much potential in gambling with bitcoin exists.Sport bets with Bitcoin and other crypto currencies will grow tremendously.
Fast and anonym transactions.And if you win you get that send to you instantly.This is a paradise for gamblers and providers.

Bitcoin and porn it is almost the same.Instant and anonymous payment.No identity or credit card infos is needed or could be stolen.
It's a win-win-win situation imo.