In the short run, we don't know what will happen in the wake of yesterday's ruling striking down "Don't Ask, Don't Tell." In the long run, as previously argued here, it is (to me) absolutely obvious and inevitable that gays and lesbians will be fully integrated into military service -- and that their exclusion, along with laws against same-sex marriage, will be viewed by future Americans with the same puzzled distance with which we consider anti-miscegenation laws today. I suspect that Americans now in their 20s can't really believe that until the mid-1960s, laws against "mixed race" marriages were still on the books. (For more: Loving v. Virginia.) I am sure that is how it will be with sexual-orientation issues; it's just a question of whether that's 20 years from now, or sooner, or later.
Given short-term uncertainty about DADT, but longer-term inevitability (according to me) of its change, two implications:
1) ROTC bans. The original reason for ROTC's removal from a number of elite universities, notably and symbolically Harvard, was to protest government policy during the Vietnam war. You can look it up (or check a past skein of posts here). In recent years the stated reason for continuing the exclusion -- after all, Vietnam is at least three wars in the past -- has been the DADT policy and related anti-gay strictures in the military. Colleges have said that these violate their rules of providing equal access for all students.