While AMD was bragging about 4K and even 5K support during the livestream on Tuesday, a company representative confirmed on an online forum that the upcoming R9 Fury X flagship will not support HDMI 2.0. This implies the card uses HDMI 1.4a, which does not support 4K at 60Hz.
While 4K computer displays usually come with DisplayPort 1.2a, which is supported by the Fury X, most UHD TVs are limited to HDMI 2.0. A lot of 4K gamers have bought UHD TVs so this may be quite a bummer and it may also hurt the living room ambitions of the Fiji GPU, especially in the case of the Radeon R9 Nano.
While the chip's other connectivity option, DisplayPort 1.2a supports 4K at 60 Hz - as do every 4K Ultra HD monitor ever launched - the lack of HDMI 2.0 support hurts the chip's living room ambitions, particularly with products such as the Radeon R9 Nano, which AMD CEO Lisa Su, stated that is being designed for the living room. You wouldn't need a GPU this powerful for 1080p TVs (a GTX 960 or R9 270X ITX card will do just fine), and if it's being designed for 4K UHD TVs, then its HDMI interface will cap visuals at a console-rivaling 30 Hz.
At present there are no DisplayPort to HDMI adapters that can handle 60fps. A passive adapter that can handle this sort of thing would require DisplayPort 1.3 so it's believed that the only solution to fix this is an expensive active adapter.