Update: Here's a video of the new displays, and more details

Sharp announced it will show two new oxide-TFT (IGZO) based OLED panel prototypes at SID 2012 next week. The first panel is a 13.5" 3840x2160 (QFHD) panel.The panel features 326 ppi and is made using a WOLED (RGBW) architecture - similar to LG's upcoming OLED TVs.

The second panel is a flexible OLED, 3.4" in size. It too features 326 ppi (540x960 resolution). We do not have more technical details, hopefully we'll learn more at SID.