Forget the penis, I can get a new kidney that my body won't reject or require me to take anti-rejection medication for the rest of my life @_@! My left kidney isn't great, and kidney failure runs in my family XP. Hopefully at worst my right kidney can take up the slack. Hopefully this technology is perfected in my lifetime ;_;! I'm only 22, so it looks good :'D.
Not sure what to say about the penis thing. I think it's gonna be a really long time before this option is available to the transgender community. It's first going to people who have suffered traumatic injuries to their genitals. Hopefully it won't be too long since the world is slowly but surely becoming more accepting of us.