Yes, this is definitely the answer to the problem of convenience vs authentication, if you ask me.
Mobile payments have the same convenience but far greater security, so should replace cards completely one day.
I expect that there will be an intermediate stage where contactless works via the fingerprint-authenticated method on a card, for people who don’t have a phone, and that may well be rolled out quite widely for those users.
Cards of the future probably won’t have magstripe, signature lines, embossing or even visible card numbers at all (so the data can’t be captured and used to buy something online) so it could pretty much just be a little fingerprint sensor gadget in the form factor of a card.