Quad HDTV is the 2160p standard, which offers a 3840 x 2160 pixel resolution. 

Sapphire also had its graphics cards on display, including the existing ATI Radeon 3870 Atomic Edition 3850 Ultimate & upcoming models such as Radeon 4850 & 4870 models. These cards can all offer the needed Quad HDTV resolution at this huge 56-inch tv.

It's said the tv will be selling for just under $60,000. Sapphire will probably put this tv on the market this year.