The growth of Ultra HD Blu-ray shows no sign of slowing down, according to the Blu-ray Disc Association (BDA), with Ultra HD capability being the most wanted feature in a television set.
More than 80,000 UHD Blu-ray players have been sold since February 2016, with 90 titles being released on disc so far.
A forecast from Strategy & Analytics states that by 2020, half of US households will have a 4K Ultra HD television - however, it's possible that Japan will see broadcasts of 8K television by that time.
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Of course, the biggest challenge to Ultra HD Blu-ray is streaming services. Platforms like Netflix and Amazon Prime Instant Video already show many 4K Ultra HD titles, with the BBC looking to launch 4K content on the iPlayer.