I disagree. Sure it's bittersweet but it's a unique piece of NFL folklore and certainly of Buffalo Bills history. It's very cool when we are the only franchise in NFL history that can claim four straight Super Bowl appearances. Until we go all the the way that 4 year period will always be looked at as the best era of Buffalo Bills football.
The problem is if the Chiefs match the feat with having Super Bowl wins along with it, then yeah this becomes pretty much obsolete for the Bills. Best case scenario Bills knock the Chiefs out of the AFC and go on to win one of own this season!