In April 2013 Sony showed a prototype 30" 4K OLED panels at NAB 2013, promising to release them in 2014. A couple of weeks ago at this year's NAB, Sony showed the panels again, this time as real product prototypes (and not just panels). The company still aims to deliver the 30" OLED monitors in 2014.
The 30" panels ofer 4K (4096x2160) resolution and will be made at Sony's Nagoya fab - the same fab that makes Sony's current 17" and 25" panels. The new product will be very similar to Sony's current PVM X300 4K, but with an OLED instead of the LCD.