I think that the information age has played a big impact in that information is now more available than it was in the past. I wonder if the information and accessibility to that information was available 40 years ago if many of the older transitioners would have transitioned earlier on. I think society plays a role as well; being trans has started to be come more acceptable in or society than it was 40 years ago.
In my case, information has helped me not only do research, but find the appropriate support (both medical and friendship wise). A lot of younger people these days have fewer issues than older people.
When I was younger, I grew up in small towns. There was no internet or widely availible information. The psych docs at the time told my mom that she just had to try harder to find male-based activities for me and find a male role model, which would "save me from a life of confusion." Back then ('80s), that's what many medical professionals thought -- that it was abnormal and that if caught at an early age you could prevent someone from growing up transsexual. Of course, now, that has changed and it has become much easier to find a medical professional with a better understanding.
As a kid, I would go to the small, local library and see if there was any information. There was nothing. The only time I got some exposure was off talk-shows, often with the audience reacting in disgust. Society, in general, viewed transsexuals as weirdos, perverts and freaks. As a young kid, this affected me a lot as I knew how I felt (and even related to those on the talk show), but I was scared of saying much. I would go into deep depressions that still impact me today. The feeling that I'm a freak and I should be ashamed of who I am was ingrained in me.
Now, with the information age, that has been changing. More and more people are starting to be "ok" with transsexuals and trans folk in general. It isn't ideal, yet, but the attitudes are changing as time goes on. More and more people are exposed to trans-folk and seeing them as people. The younger generation has a very different viewpoint and attitude vs the older generations.
With more information, we can connect with each other. It's much easier to find other trans-folk to relate to and it's much easier to get connections to doctors, therapists, an psychologists who have an understanding of transsexualism.
The internet has made a huge impact.
I would say that in the next 10 years, there will be even bigger changes and more acceptance. I also think we'll see more variety, as gender queer, two-spirit, bi-gender, androgynous and so on also come with the flow of information. Society will continue to change and the out look will look better for trans-folk.