There are some new rumors that Sonys KDL-ZX OLED series
starts with an 27 inch size at CES-2010.

The leaked information has come from a 24-page document from Sony outlining what will be on show at the CES 2010 in Las Vegas. The KDL-Zx is still at Beta stage, and not ready for the market.

The super top emission panel does have FULL HD 1920x1080 Pixel.
The 27-inch model is incredibly 10 millimeters thin panel and offers over 1,000,000 :1 contrast ratio with outstanding brightness, exceptional color reproduction, and a rapid response time.
Source Smarthouse