Over the next 2 years, the familiar "Connect Wallet" affordance will disappear from most DApps except DeFi. 

Crypto onboarding will occur through simple, familiar mechanisms. No pop-ups, no hashes, no transactions, no fees.

Users won't even know they're using crypto.

Crypto @ Coinbase, foreign policy, political theory. yugacohler.twitter

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I have full control over my wallets, which cannot be said for corporate-owned service accounts. 
Wallet connect provides me with independence and resistance to censorship or other forms of repression.

A common misconception! The method of authentication (e.g. with Google or Email) is totally independent of the custodial nature of the wallet. Coinbase's Embedded Wallets are non-custodial, using multiparty computation under the hood to shard your private key for maximal security.

If I lose my Google account, how would I authenticate the wallet?

oh right. i tried it out today already, used apple keychain. but theres no option to add a backup email. maybe thats coming soon, i know its beta

Using a backup mechanism like email. If your email is Gmail, then you may be out of luck. You can also export your full private key at any time. But it seems harder to lose a Google account than a seed phrase!