By Noel Randewich SAN FRANCISCO (Reuters) – Apple Incs long-awaited launch of tap-to-pay technology in its new iPhones and smartwatch may be the seal of approval that near-field communication technology needs to become as commonplace as wifi, Bluetooth and GPS. Called NFC, the technology lets smartphones communicate wirelessly with other devices such as point-of-sale terminals by holding them together. While proponents have argued for years that it is ideal for secure payment systems that could eventually replace credit cards, none have taken off. At a gala event on Tuesday, Apple Chief Executive Officer Tim Cook uncorked Apples attempt at mobile payments, called Apple Pay, using NFC chips built into the companys two new iPhones and Apple Watch.