I wouldn't say that the following is definitely happening as there is no point doing research if you're going to do something anyway! And BT does not have a 4K box and there's been no talk of a 4K YouView box anywhere. But the Champions League pricing sounds highly possible.
"This has not been announced officially, however the wife has just completed a survey which has extensive details of next season's BT Sport pricing.
There are going to be two options.....a Pack A containing the Premier League etc and a Pack A+B which contains CL football.
To get the European football you need to upgrade to A+B which will cost £4 per month extra if you watch BT Sport on a Sky box.
But if you have BT TV then the CL will be free. Looks like they are going all- out to sell their platform.
Also, it said that 4K matches will be broadcast exclusively on BT TV. And all red button matches will be HD only on BT TV."
http://helpforum.sky.com/t5/Live-TV-...g/td-p/2187957