I have dreams about carrying occasionally.
Weird dreams, but dreams nonetheless.
I envision uterine transplants within the next 20 years. But you'd need ovaries too, and ovaries which you wouldn't automatically reject without tons of medication I don't see being grown in a lab anytime soon. Without ovaries, you'd need to maintain a delicate balance of hormones, directly mimicking a genetic woman's body during the different stages of pregnancy. There's a crap load more to carrying a child than just having a sack of flesh there capable of holding a baby. Spontaneous abortions are common enough with cis women, I couldn't imagine how difficult it would be for a transwoman. I, for one, couldn't bear to have a miscarriage, let alone several.
You'd have to get a cesarean, too, so there's that.