One week ago, my column "The Night That Twitter Changed Television" chronicled the excitement of watching "The Voice" the night before -- when NBC's red-hot competition show initiated a new feature in its viewer voting process. Host Carson Daly turned the whole ballgame over to viewers with Twitter accounts. Watching all that play out last week was exciting, mostly because it had never been seen before on a reality-competition program. This week, watching it play out was decidedly less compelling. Gimmicks are like that -- they tantalize at first, but quickly fade upon repetition.