Filed under: Displays, HDTV, Home EntertainmentOh, how the times they are a-changin'. Merely months after Vizio ousted Samsung as the LCD TV king in Q2, Sammy is back on top of overall flat-panel TV sales here in North America. Thanks primarily to a staggering 37-percent quarter-to-quarter growth rate (compared to Vizio's 12-percent), Samsung now has an 11.8-percent unit share compared to Vizio's 10.2-percent. Strictly looking at LCD TVs, Vizio stil