A model poses with a Samsung Electronics' new 75-inch F8000 Smart LED TV during a media conference in Seoul yesterday. Samsung yesterday launched a set of giant, Internet-enabled televisions aimed at boosting profit margins and cementing its lead in the world's TV markets hit by slowing global demand. South Korea's Samsung, the world's biggest flat-screen TV maker, and domestic rival LG have aggressively promoted pricier premium TV models in recent years to cushion the fallout from the global slowdown which has dampened demand.