Men and women serving in the military who identify as trans still cannot be open about their identities and maintain their positions, leaving many people trapped within bodies which do not fit their identities in order to continue to serve their country. Most other countries, although allowing gays and lesbians to openly serve, mirror this approach toward transgender individuals.
No matter who you are, you should be able to serve your country if you are fit and willing. Transgender individuals are just as capable as others in performing the duties required to serve, just as it has been confirmed our gay and lesbian members of the community are capable.
The repeal of DADT is a mark that acceptance is finally happening for the gay and lesbian community, that the government is willing to recognize the potential of all of the individuals who have served their country despite the fear of people finding out who they are and losing the chance to perform that service. Hopefully at some point this mark of inclusion will be granted to the trans community. It will just take some more time to develop the acceptance needed to persuade the people.