This was an end of an era because this would be the last time that the Giants and Bears would play each other for the NFL Championship. Because even though both teams were still competitive for the rest of the 1960s, they were no longer NFL Championship contenders. And by 1970 they were now playing each other in the same conference what is today known as the National Football Conference, after the NFL/AFL merger. So the 1963 NFL Championship wasn’t the end of one of the best NFL rivalries, but it certainly changed and was no longer very important as far as the current league. Because both teams were fairly mediocre for the rest of the 1960s. Both teams were bad in the 1970s, only making the NFL Playoffs a total of two times. The Bears both times in 1977 and 79. With both clubs not becoming contenders again until the 1980s.