In the annals of product launches, the advent of 3-D TV won’t go down as a high point in consumer love at first sight. The product first drew hype, then modest sales. But after five years on the market, the format has stalled. One mass-market manufacturer, Vizio, announced with the new year that it has pressed the pause button on 3-D. Major content providers ESPN and the BBC have discontinued 3-D TV program development.