Both casinos are modernized and work uniquely. Casinos, mostly, are run by hotels. I don't see a future where gamblers won't visit hotels, or travel on vacations. The traveling niche is filled with gamblers and people who play for relaxation. Unless the world returns to Covid days, nothing meaningful will affect the growth of brick-and-mortar casinos. It'll continue to expand.
For instance, everyone can watch matches on TV, phones, and laptops, yet the stadiums are filled to the brim. The same applies to gambling, most people enjoy the real-life experience. Online gambling is boring to an extent.
Also casinos are great excuse for social gatherings. When you are in a hotel, there needs to be things you can do, other then watch tv, eat and drink from the minibar. So they have bars, but just drinking beer isn't enough activity, in fact it can be boring if you don't have anyone you just enjoy to talking to. So, they need activity. There can be spas but those aren't really for party mood.
Casino on the other hand is a perfect side hustle for hotel. It makes random guests to come same tables to socialize (at least on some level). Some people want to spend more because they want to impress people and even if they don't do it to impress anyone, drunk people will most likely spend more than they intented while toxicated. And while not everyone is drunk or doing their "fear and loath in las vegas", it's still quote common to order expensive drinks and party in there.