It is a cruel but entertaining prank which does a highly effective job of promoting LG's ultra high-def televisions.

这起有趣的恶作剧虽然很残忍，但是很有效地推广了LG的超高清电视。

youdao

Also on the slate is the company's first 3D LED Ultra High Definition set, a 55-incher that will be displaying Ultra High Def footage of booth visitors.

ENGADGET: Haier celebrates IFA with ultra high def 3D, transparent and eye-controlled TVs

Sure, we ink-stained wretches come to the Consumer Electronics Show in Las Vegas every year to see the hottest new cutting edge devices, which this year include things like 4K ultra high def televisions and a wide array of tablets and mobile phones.

FORBES: CES: Hey, Sphero! Shall We Play A Game?