Just to add to this, with Sky TV, you get a Sky TV box, and a Sky router. You then have a bunch of secondary TV boxes around the house for multiroom.
The Sky system supports linking every TV box over both WiFi and PowerLine, Sky have actually entirely disabled the powerline system and on new routers they don't even support it, as it was found to cause VDSL drop-outs. Now everything on Sky Q, all the TV boxes, main router and WiFi boosters have to link over WiFi.
When you mention WiFi causes higher latency, it certainly should not if using 5Ghz with a decent reception.
Without question powerline / homeplugs = VDSL drop outs in plenty of homes, mine included.
Edited by ukhardy07 (Thu 09-Nov-17 22:14:22)