Let's take Axie Infinity as an example. Many people, even not crypto-oriented or familiar with anything about crypto try to enter game and forced themselves to learn because of the play-to-earn- feature.
The same will goes on Metaverse-based games that involve gambling features. Even a gambler is not familiar or having difficulty understanding the stuff about metaverse or NFTs, as long as they see more opportunities to earn here while doing gambling, they will do anything to learn it.
And no. It won't be a threat in the future for usual gambling because features are different.
Where the money is that's where people will go, that is why so many people learn about Cryptocurrency because of Axie Infinity the attraction of making money for just doing simple tasks is a big come-on for people who want income at their home at this time of the pandemic.
Metaverse is something new and it's taking the Crypto community by storm there are so many projects involving metaverse but people should still do proper research, as scammers will make this new niche their new playground.