I don't think this have been downvoted, this is a really really obvious thing to do with the raging success of both Apple Pay/Shop Pay/Android Pay/Samsung Pay/Paypal and Afterpay and it's clones. From the financial perspective of the big three companies that make browsers they're nothing more than shopping portals and all new user-facing features built into browsers support the user-stories of people buying things.
Paypal & Shop Pay have the problem of getting people to let them store their CC info to upsell them on afterpay type stuff and CC offers -- browsers and $Platform Pay already have it so MS is bootstrapping their $Pay service via the thing they can control.
But the reason I use Apple Pay and Google Pay before that is that it is more convenient and I can avoid touching the PIN Pad. I pay in full immediately.
Paypal & Shop Pay have the problem of getting people to let them store their CC info to upsell them on afterpay type stuff and CC offers -- browsers and $Platform Pay already have it so MS is bootstrapping their $Pay service via the thing they can control.