If it wasn't predictable, our news is already talking about making military assault style weapons like the AR-15 or the AK-47 (semi-auto citizen style) illegal or harder to get. I think that is the low hanging fruit for those wanting more gun control. It makes sense to me, though I don't know how effective it can be. They seem to be a weapon of choice for mass murders and I read a few reports where police are saying they are becoming so common among gangs and drug dealers that the criminals have better fire power than the police.
Bae mentioned that they are becoming popular hunting guns, but most of my friends who do deer and elk hunting use larger caliber bolt action rifles and would probably consider the AR-15 too small a bullet for big game. They probably have some function to plink at varmints. So limited use as a hunting weapon and plenty of alternatives.
I can not visualize a practical other than Limited hunting. There are better choices for home defense and they are not especially portable as a concealed weapon for personal defense out side the home. Maybe they could be used for defending a food source when the hordes attack after nuclear winter or an attack of zombies.