According to Deloitte, 2013 is the year kicking off the 4K (aka UHD) TV roll-out, even if the technology still needs 18-36 months until it is technically and commercially ready for broadcast.
As seen at CES 2013 a fair number of vendors (10 in all) are preparing 4K sets, with around 20 different models to be available by end 2013. Such TVs already have buyers-- LG tells Korea's ChosunBiz 300 84-inch 84LM9600 sets, each worth around $20000, found a home already.
The number of 4K consumers will grow once more content will become available, as seen a few years back during the initial stages of HDTV. More professional and semi-professional 4K cameras will also be available, while the industry should agree on updated standards (such as HDMI) able to better handle 4K data rates.
Initial 4K TV transmissions are taking place-- Europe already has a dedicated demo channel, courtesy of Eutelsat Communications. Deloitte predicts commercial 4K broadcasts will take place from 2014-2015.