An improved box office is expected to push total U.S. spending on entertainment -- primarily movies, music, and video games -- up 4.4 percent to $87.5 billion this year, according to the annual Communications Industry Forecast and Report by private equity and capital-fund managers Veronis Suhler Stevenson. The figure compares to a 2.3-percent decline in 2005. The report credited three movies for being primarily responsible for the uptick -- Pirates Of The Caribbean: Dead Man's Chest, The Da Vinci Code and Superman Returns.