I renovated my house, And I have 3 big 70"+ TVs, two inside the house, and a Samsung Terrace outside by the pool. For the soccer world cup, any other sports event, or even movie night, I would like to have all TV playing the same video signal at the same time. As for audio, I purchased and will get installed soon Sonos speakers indoor and outdoor (Arc + 2 rear 1SL on the two indoor TVs +1 sub, just 2 outdoor speakers for outdoor TV), so I think I should be able to pick any TV as the main source and get Sonos to play that audio everywhere, but I guess I can leave each Sonos "home theater" play his own audio from the corresponding TV. In the figure below you see my house plan, with the red dots being the location of the 3 TVs. The The bigger dot is where I would like the "main" TV (or main location), in the sense that I would like either to mirror the signal from that main TV to the other 2 TVs, or I would like to use that as the main location in which I have my laptop sending a movie to the 3 TVs using a 3-way splitter. Honestly, the laptop is probably not needed but sometimes is just easier to use it to control stuff (plus if I play youtube videos at a party I can use adblocker). Wire distance between main location and the other indoor location will be 46 feet (going through the attic and including descending from the ceiling), while to main to the outdoor location is 30 feet. The questions are:
1) would you use HDMI cables? in which setup? Would you use a powered extender? I heard past 20 feet quality progressively drops and above 50 feet is crap.
2) the "main" TV and another TV out of the three TVs are 4K 120fp, the third one is 4k 60fp. Should I get a 120 hz HDMI cable? Do they even stream Netflix or soccer events at 120hz? I guess it could be an investment for the future to have 120hz, since I don't want to have to pay to rerun those attic cables again
3) Should I pick any TV as the main source and get Sonos speakers grouped to play that audio everywhere, or should I leave each Sonos "home theater" to play his own audio from the corresponding TV, or it doesn't matter?