Last year Panasonic unveiled new 65" 4K OLED TV prototypes at the IFA 2014 trade show, and the company is showing what seems to be the same prototypes at CES 2015. Panasonic executives at CES said that the company plans to release these OLED TVs in 2015, but the company later denied that it had any immediate plans for commercialization.
Sony and Panasonic halted their OLED TV joint development project in December 2013, and Panasonic (together with JDI, Sony and the INCJ) formed a new company (JOLED) to develop small/medium OLED panels. But the company OLED TV program is reportedly halted (or slowed-down at best) and these new prototypes use panel supplied by LG Display.
LG Display was actually already in talks with Japanese companies regarding an OLED TV panel supply deal back in January 2013. LG Display is already supplying OLED panels to several Chinese makers.