The TVs were unveiled this week at the International Consumer Electronics Show, an annual showcase in Las Vegas for the latest smartphones, tablet computers and other consumer-electronic devices.
WHY IT'S HOT: It's the first time in years we're seeing a new screen technology for TVs. OLED screens can be extremely thin. LG's set is just 4 millimeters thick. That's one-sixth of an inch. The picture quality is stunning too, because OLED TVs can present highly saturated colours and a nearly perfect black.
THE UPSHOT: The screen technology is in use in high-end smartphones, but it has been very difficult to make larger screens with consistent results. In 2007, Sony Corp. started selling an 11-inch OLED TV for about $2,500, but it never followed it up with a bigger model. Since then, LG and Samsung have shown prototype OLED TVs at the annual CES show, but hadn't revealed any marketing plans until this week.
THE DOWNSIDE: Samsung and LG haven't announced a price, but expect the sets to cost more than $5,000 each. It'll take at least a few years for prices to come down enough for most people.
AVAILABILITY: LG said fourth quarter of this year, tentatively. Samsung only said "this year."