Montana is refusing REAL ID. The Feds keep backing down when a deadline rolls around. October 10th is the next deadline. The people we have in office haven't budged and have said they won't. Previously elected officials have also rebuffed REAL ID, so it isn't just a couple rogues standing their ground. Time will tell, though.
I obtained a passport in part to have a second form of ID in case I lost my DL. Occasionally, one needs two forms of ID, so having two State accepted picture ID's is helpful. That is a rare occurrence, but if you need a spare form of picture ID, you usually NEED it.
Getting a passport for the first time requires you to be there in person. If you want to renew it, you can often do it by mail. If you are stationary and can do it, now might be a good time; that way when time comes to renew, you won't need to be somewhere. If you apply for a passport in a state other than your state of residence, you need an additional form of ID. Even if you decide to not acquire a passport, how to go about it is good knowledge to have. And the waiting period will only get longer the more you put it off. You can shorten the waiting period, but it'll cost ya.
http://travel.state.gov/content/passports/en/passports/renew.html