Comment by rationalist

> I did wire every room (myself) with cat5 cable and RG6 coax

I think the best idea is to install conduit as the house is built, so that outdated wires can be replaced with newer wires by just tying the end of the old wire to the end of the new wire and pulling.

Just be sure to inspect the house as it is being built, because I think one user on HN wrote that conduit was required by law, but when he went to swap the wires, he couldn't pull them - he discovered there was only pipe in the visible terminations, not the whole route.