Admittedly the porn payments are going to raise awareness for those who want a certain level of anonymity.
But real mainstream acceptance, in my opinion is going to be with more mundane and everyday things. Avoiding currency conversion costs could be a major incentive.
When you mentioned "missionary positions" in the first post I knew we will eventually end up mentioning porn

As for tourism, more and more people rent their guest rooms. If you want to visit a country and really get to know it, you have to spend some time with the people, preferably in their own home, eat some homemade food and allow them to show you places. With bitcoin you don't have to worry about the prices or exchange rates, you just take your phone and have fun.