Hi Marco, I went the whole hog to sky Q silver, sports, and fibre max just before my knee operation in August (PCL reconstruction), to partner my 4K Panasonic 55" (CX802), as an aid to recuperation...with the silver package there's a sky Q mini, which gives one multi room albeit 1080p, so that's excellent for bedroom viewing.
As for my 'fiber' (there's copper in the chain), it is only 40Mb/s, however that's still plenty quick enough, downloads are view able within seconds.
The Panasonic TV is excellent, it was last years flagship, on sale for less than half price, with a quad core processor it's up-scaling and picture enhancement of HD to 4k is surprisingly good, but assigning the up-scaling to the Q box gives even better results. As it's a smart TV, and connected to fiber, 'Youtube' etc is available in full resolution...This snap of a '4K Psychedelic Tunnel' video doesn't do it justice!
Attachment 18714
...you'll also see that I needed a large TV to match the speakers!, well that was my excuse to the missus
At the moment the UHD content is limited, all premiership matches are available in UHD, with one downside no 'live pause' etc., for that one has to return to the HD channel...I'd suggest this is for security rather than technical reasons, as other UHD content (via a UHD box set menu), can be played as normal.
Although sky's UHD is apparently compressed the images are stunning, motion and panning across a football match feel very natural, probably the most difficult task for any TV, and the resolution is incredible.
I treated myself to the Revenant in UHD from the sky store, it really deserves to be seen at this resolution...