Originally Posted by
Biscuit
I suspect, as you already mentioned, the powerline will be your bottleneck anyway. Using a gbit switch without upgrading them will be a bit of a waste. Even so there shouldnt be a limit for 4K media if its decoded locally to the television.
No need for any kind of smart switch, anything basic will do the job you describe. I use a mixture of cheapo netgear and TP link gigabit switches around the flat for basically the same purpose as you explain. Works perfectly fine.
Personally I prefer the ones with metal cases over the plastic ones... but I suspect the innards are basically the same.