I can see you're surprised indeed. The truth is that it's possible and has been in existent for a long time. I remember Coinbase Wallet has that functionality, though it's been a long time since I used the wallet. I remember one could transfer Btc to other coinbase users with just the email address.
This is just an idea or they actually have working product? Will there be any testnet soon to check and verify if it's really possible? And how secure it would be.
I guess they're already working on the modalities to ensure it's implementation. I know it would undergo the necessary test before it would be made available to the public. On the security of the wallet, I believe that bora has what it takes to guarantee the security of her wallet.
Not sure if they have outlined the security measures in place, if they haven't, then they should do so by briefing the community what they have to ensure the security of their wallet, it shouldn't be all out because of the negative side of spilling such, if possible, something that makes their security different and it should be in away that will encourage users to use the wallet productively