The biometrics-backed, formerly mobile only payment service Apple Pay has launched on the web, raising a new challenger to Paypal.As of today, Mac users can use the Safari browser to pay online via a “Pay with Apple Pay” button, and authentication can be done using Touch ID on a phone or watch.The move means that websites as well as iOS apps and physical retail stores can also process payments through Apple's systems.Earlier this year when Apple revealed the step, analysts warned that Paypal could feel an impact.Piper Jaffray analyst Gene Munster has said that PayPal will lose market share because he sees Apple Pay as a superior payment solution and labels it as a major threat.”We expect the proliferation of Apple Pay options on websites to decrease the friction involved with checking out and, over time, to take share from PayPal,” Munster highlighted. The analyst noted that unlike PayPal, Apple is not looking to directly monetize payments. The analyst said, “This competition will likely convert shoppers at similar, if not better, rates than PayPal in the long term and at similarly secure levels, but without burdening the financial system with fees designed to directly monetize the transaction.”The deployment comes amid reports suggesting that Apple will include Touch ID within the MacBook Air 2017 Trackpad, which may also get the Force Touch upgrade that was given to the 13in MacBook Pro back in March 2015, and comes with the new MacBook.