I think that, like soap operas and sitcoms, porn mirrors the culture at hand--just, these days, smaller and smaller segments of that culture due to the long tail and creation of niche markets. Making a change to porn won't make a difference overall to the culture--first the change has to be made to the culture, then porn will reflect that change. Y'know, in another generation . . . If we want people to see us as women, we have to show people us as women. The trouble is, it's not sensational news when a TS has transitioned properly, because all you get to see is a normal woman living a normal life, and from a news standpoint that's boring--but if gay men can slowly begin to convince many straight people that they're good members of society then we can do the same. At that point, anyone who comes out MtF would be treated like a woman (or at least someone who, like little girls, trains to be socialized as a woman) even if they stayed out. Though, yeah, we'd still be sexually objectified--just maybe more the way women are then the way we are right now, in an in-between state (it's always worse when you're Other, and from a great many perspectives at the moment we're considered Other).
Prostitution is another deal. I personally am in favour of a highly regulated version of it, and wish Canada would get this fixed. If it was, it would be possible for a prostitute to work more or less safely, and to get out without problems once they made the money they needed to (if they want to get out, that is). Brothels are now legal in Ontario, and now they ought to be heavily encouraging those brothels to draw in the street walkers and drive out the pimps; this is not yet an industry where just anyone can freelance safely (frankly I'm not even in favour of the upscale models working alone, but there's not much that can be done to stop them from taking the risks, given that some of their clients may be pretty powerful men).
I look forward to the day when cosmetic cyborg implants become available. Then the available kink for people to focus on fetishizing will be so much beyond the pale of current societal norms that people will look at us and say, "You're pre-op? Who cares? Let's go check out the robotic extensions on that guy." And leave us in peace to just be women.