Pity the Los Angeles residents who lug home pricey high-definition television sets only to find that most of their shows don’t look much better. The entertainment capital of the world ranks last among the five biggest U.S. markets in the number of high-definition channels available to cable-TV subscribers. New York, Chicago, Houston and Philadelphia all get far more, as do such smaller cities as San Diego and Charlotte, N.C. Southern California’s No. 1 pay-TV provider, Time Warner Cable Inc., can’t improve its systems fast enough to keep up with demand for the sharper pictures of high-definition. For the full story visit http://www.latimes.com/business/la-fi-hdtv27-2008may27,0,2651157.story