On Terrestrial TV? Not that I know of. Though Paris currently has similar tests going on.
On Satellite, Cable or Streaming things look a bit different though.
Sky UK and BTsport both have a 4K channels and the BBC shows some World Cup matches in 4K via the iPlayer.
In Germany Sky also has 4K channels and is showing some matchs of the World Cup (which they sublicensed from the public broadcasters). Then there is HD+ with their UHD1-Channel which shows various programming from different participating FTA networks and the biggest comercial channel RTL just launched their own 4K channel to show F1.
In Brazil there is SporTV 4K which showed matches of the 2014 World Cup and is broadcasting select events ever since.
In France TF1, Canal+, BeinSport and SFR Sport have 4K channels.
TRT (the Turkish public broadcaster) has a 4K channel, so does SRF from Switzerland and TVP from Poland and the Austrian ORF as a similar streaming setup to the BBC for 4K.
There probably is more, but that’s the ones I currently know about from the top of my head.