What I've got in the wall, which is what the original builder installed more than half a century ago, is a piece of pipe (looks like bog standard half inch copper pipe) from the attic to where the TV goes.
Really really low tech. But completely flexible and future proof, as I can draw any cables I like through it.
Right now it contains a TV aerial downlead, a radio aerial downlead and a set of loudspeaker cables, think that's the lot.
And it's full. So the phone wires and the CAT5 from the cable modem to the router have to go through separate holes in the ceiling
(As we don't watch TV I suppose I could take that wire out which would make a bit of room ...)
So, my recommendation these days would be to run
two lengths of central heating pipe, then you've maybe got enough space for a while.