One of the hottest HDTV trends is slimming down already skinny flat-panel televisions. At CES 2009, there were loads of prototypes of ultra-slim plasma and LCD TVs, shrinking overall thickness from around 4 inches to one or less. Hitachi is in the vanguard of this trend with its much-publicized 1.5-inch-thick series of LCD HDTVs, which are available today. Now, is a supermodel-thin set the way to go, or is an "obese" 4-incher the answer? Hitachi sent us a 37-inch UT37V702 to find out.