This Court appears to like and stick with very narrow decisions. The question before SCOTUS has to do with the Constitutionality of a ban on ownership of a type or class of firearm. Expect a decision favor of gun rights, but it will probably stop at incorporation of the 2nd Amendment against the states and affirm the right to 'keep and bear arms' is an individual right.
Anything more than that will require more cases, or lawmakers to give up their anti-Constitutional restrictions like cities around Chicago did after Heller. It would be wonderful if SCOTUS would decide they are a little tired of these cases after Heller and McDonald came so closely together and make a more sweeping ruling. Dicta can help lower courts make rulings after a decision ... but not always.
People don't like to be meddled with. We tell them what to do, what to think, don't run, don't walk. We're in their homes and in their heads and we haven't the right. We're meddlesome.--River Tam