Any tech that embraces decentralization and user ownership is considered Web3, in my mind. And any website or application that leverages that technology as a first-class citizen is considered to be Web3, in my mind. It does not have to be cryptocurrency related.
That being said, I think EVM-compatible wallet login will be stickier and have broader network effects as there are exclusive services you cannot access without it (unlike OpenId, which is merely an alternative to other logins).
There is also a major economic incentive to build user-friendly wallet experiences (such as Rainbow, Argent, and Dharma mobile apps) as well as browser plug-ins (Metamask, Coinbase Wallet, etc) and hardware devices (Ledger, GridPlus, etc) and I think that ecosystem of competition is going to produce some big UX wins that OpenId will never really be able to compete with.
That being said, I think EVM-compatible wallet login will be stickier and have broader network effects as there are exclusive services you cannot access without it (unlike OpenId, which is merely an alternative to other logins).
There is also a major economic incentive to build user-friendly wallet experiences (such as Rainbow, Argent, and Dharma mobile apps) as well as browser plug-ins (Metamask, Coinbase Wallet, etc) and hardware devices (Ledger, GridPlus, etc) and I think that ecosystem of competition is going to produce some big UX wins that OpenId will never really be able to compete with.