Update: now it seems that a different Panasonic executives claims that Plasma R&D will continue. Panasonic will continue to produce PDP and perhaps they will also update models, but perhaps what they mean is that they will not improve on the plasma panel technology itself (but rather add features such as smarter interface, etc)?
In December 2012 we heard reports that Panasonic may stop plasma R&D by March 2013, and focus on OLED TVs and other display technologies instead. While Panasonic still makes Plasma TVs, today the company confirmed that plasma development has ceased and some of the engineers were indeed shifted to work on OLED displays.
In January 2013 Panasonic unveiled a 56" 4K2K OLED TV panel prototype that was produced using an all-printing method. Panasonic is using Sumitomo's PLED materials and is collaborating with Sony on production technology. Some reports say that Panasonic aims to release their first OLED TVs in 2015.