They got 40 years and counting of economic activity from casino gambling? I'd take that.
They did and even today, the boardwalk is a pretty vibrant place. However, walk a few blocks inland (other than Tanger Walk) and it doesn't appear that activity successfully spilled over into the revitalization of the community itself.
I think this is an important point, but not a recent occurrence. The casino concept, proposed with the idea of revitalizing the area and closing the budget, was either ill-conceived from the beginning or pitched as such simply for marketing purposes in order to achieve the goal of legalized gambling. The former (revitalization) never really happened. The boardwalk area and, to a lesser extent, the marina area, were the only places that were every really nice in AC after the 60s. The rest of AC was plagued by poverty and crime over the entire history of the casinos. The latter (tax revenue) certainly worked, and worked well. The infrastructure in the "important" parts of AC is top-notch.
However, and this should be obvious, casino development is a use that does not really complement anything else. A casino is designed to have everything you need inside so that you never need to walk outside. On the street side in particular, but even on the boardwalk side for most of the casinos, there is not street/board-level activation. A couple have restaurants with outside seating, but otherwise it is just entrances to casinos/hotels. Most of the storefronts (arcade, pizza, fries, souvenir crap, etc) on the boardwalk are not connected to casinos, nor is the pier. The one pier that is casino-owned is an enclosed mall. The boardwalk is crowded in the summer because it (and the stores, pier, etc on it) is an attraction in its own right. Boardwalk traffic is not really casino-related, though the people may be there because of the casinos.
Last, it is important to remember, and I think an important distinguishing characteristic between AC and LV, that AC is a very seasonal town. No one is on the beach, the other major "trick" of the AC pony, for 8 months out of the year. The boardwalk is a ghost town for at least 3 months out of the year.
AC would probably be a much more sustainable town if they were a straight resort town like most of the NJ coastline, but I don't think casinos are going anywhere. The Borgata is the best performing casino in the country (yes, the country). Revel was ill-conceived from the beginning (rather, when they decided to continue after 2008), and anything that has been touched by Trump has basically existed to go through bankruptcy. Showboat had been pretty decrepit until the early 2000s, but then they sank a whole lot of money into it right before the downturn which both helped them and put them in a precarious situation. The casino was still profitable, but Caesars (parent company) shut it down to reduce its exposure in the market. Of the other two that closed, the Trump Plaza was outdated, and the Atlantic Club was a dumpster fire.
So what's left:
Taj Mahal - I think the closure of the Plaza will help this one stay open. Its a pretty cool casino in good condition, though it is kind of on a island now at the north end of the boardwalk.
Borgata - the other new one before Revel. Easily the class of the town, and it is doing gangbusters.
Golden Nugget - previously the Trump Marina, I'm not sure this one can last. It has seen better days and the other two marina casinos are much nicer. However, it is the only casino owned by that group in AC, so they might be better able to keep it open than Caesar's is able to keep their 3.
Tropicana - another with just one in AC, planning an expansion. In pretty good condition and doing good business
Harrah's - very nice still and recently expanded. The Pool is ridiculously popular. I don't see this one going anywhere
Caesar's - Expanded like crazy over the past decade, and is the flagship of the brand, probably the most popular on the boardwalk
Bally's - the third Caesar's property. Its HUGE. If Caesar's decides they need to close another, I think this will be the one.
Resorts - the original, expanded in 2004, rebranded recently, still holding it together, only casino in town for the company.
Revel entered a market that was already oversaturated, most of the casinos have gone through bankruptcy proceedings in the past, and a bunch of them have really over-leveraged themselves over the past decade. That said, they're still making money. The AC Club will probably turn into a hotel, but the rest will probably be bought for very cheap and reopened Revel and I think Showboat for sure. The Plaza maybe as well. Then there will STILL be way too many casinos in AC!
Also, they really need to bring back the actual pony at Steel Pier.
I also know that hurricane Sandy hit AC pretty hard and actually took out parts of the boardwalk. I was actually there for a bachelor party when the hurricane hit. We had to cut the trip a little short.
AC really only had minimal flooding from Sandy, and that was mostly away from the casinos. There also wasn't much damage to the boardwalk. There was a report about boardwalk damage that took pictures of previously-damaged sections, so that might be where you are getting that. LBI is really the southernmost place where you started to see significant damage occurring, below that is was mostly flooding (without dune breaching).