TFred, the prognosticator, predicts that even if this bill passes, it will take years of litigation before the law takes effect, and after that, it will take even more years of civil litigation, coupled with multiple 5 to 6 figure punitive awards to victims of hard-headed anti-gun police departments who will insist on providing "danbus-style" treatment to legal concealed carriers, before concealed carry begins to be a normal happening in some of these intensely anti-gun states.
One problem that will certainly crop up is that many states have no system in place to instantly verify permit holders. This nationwide idea is often compared to drivers licenses, but there is a nation-wide system in place to more or less always validate license holders and the current status of their license.
Tell me what happens on the side of the road late on a Friday night in New Jersey when, for whatever reason, it comes out that you are carrying a concealed weapon, and you hand the officer a frayed piece of paper that says you are allowed to do so. If your state does not have 24/7 validation capability (a problem which has prevented some reciprocity agreements even now) you're going to end up in jail all weekend until they decide to make a couple calls on Monday morning - or afternoon - to see if it's valid.
I see a long road ahead, even if this first step opens the door.