Second quarter global shipments of 4K Ultra HD (UHD) TV sets surpassed all UHD shipments for full year 2013, according to findings released by NPD DisplaySearch. The market research firm said UHD shipments reached 2.1 million sets in the period, compared to 1.6 million sets shipped throughout 2013. The increase was attributed to more brands introducing 2014 model ranges in the second quarter, with a clear focus on 4K as the “must-have” consumer feature for high-end television viewing.