They do, they just don't have a set opponent.
And with the top 4 teams going to the playoff, the Rose Bowl getting the Big 10/Pac 12 teams (champs or next best) and whatever bowl getting the Big 12/SEC champs (or next best) they aren't going to have a quality opponent. They'll probably be stuck with the Big East champ most years, which will be even worse than before with WVU, Pitt and Syracuse out of that league.
Point being, the Orange Bowl isn't going to draw ratings (already has been the lowest rated BCS game most years) and not really be a major bowl any more. So really the only major post season games anymore will be the semifinals and championship game and the Rose bowl and whatever bowl the Big 12/SEC match up ends up in.
So I'd say the announcement upped the likelihood of the FSU/Clemson to Big 12 move happening. And there are some rumblings about VT and NC State to the SEC starting as well. If all that happens, the Big 10 would probably expand and would probably go after some ACC schools like UVA and Maryland perhaps.
Time will tell, but the move shows the ACC is kind of on the outside looking in as they're the weakest of the 5 major conferences by far with a 4 team playoff looming and an unattractive non-playoff bowl match up for their champ/runner up in the Orange.
Teams that want to remain relevant in college football are going to want to be in one of the 4 major conferences (as those champs will be the 4 teams in the playoff most years), so I think more realignment is inevitable at this point. A major power like FSU isn't going to want to be on the outside looking in. Once they jump ship, the ACC is no stronger than the Big East was really, so I'd look for more teams to bolt if that does happen.