This is something quite unexpected, but Panasonic has teased it's upcoming WT600 television ahead of IFA 2013 which supports the HDMI 2.0 specification. The Panasonic WT600 is a 65-inch 4K-capable TV, that features HDMI 2.0 which handles 4K at 60FPS.
HDMI 1.4 is only capable of handling Ultra HD resolutions at 30FPS, which is a pathetic frame rate for such a high-resolution display. Panasonic's WT600 TV will also include support for DisplayPort 1.2, as well as 4K specific features such as a web browser, media player, rendering engine and THX certification.
We saw the HDMI Licensing group announce HDMI 2.0 just minutes ago, which has some very nice super-powers, including the aforementioned 4K at 60FPS. Panasonic's press conference is penciled in for later on today, where we should hear more about the WT600.