The BBC will trial ultra high definition broadcasts for certain World Cup matches this summer, but the bad news is us viewers won't be able to watch them.
It's just a test, so the Beeb can see the trials and tribulations of broadcasting in the new resolution.
Only staff at the BBC's research and development facilities will be able to watch in 4K, which has about four times as many pixels as standard 1080p HD.
Live 4K footage will be sent to the UK from Brazil. It will then be decoded, and sent on to some standard 4K TVs in BBC facilities, to gauge how it would look to the average viewer.
"The trials will prove hugely valuable in furthering our understanding of UHD technology, and potential distribution models for the future, as well as providing real benefits for licence fee payers in the near-term," Matthew Postgate, BBC research and development controller, said in a statement.
4K TVs are currently on sale, and the prices are coming down, but there's not much 4K content to watch on them yet.
Netflix has started showing its home-grown series 'House of Cards' in 4K, but that's the exception rather than the rule. According to the streaming service, 4K is five years away from becoming mainstream.