One more thing I forgot. One thing you don't need is the old phone sockets. Just replace with Ethernet and use VOIP. So much better and cheaper (although sometimes a little less reliable).
Just make sure to setup e911 on the home VOIP phone.
Why? RJ-11 provides a small power drop without the need for expensive electronics with a PoE solution. You could probably make all the components you need to power the wire with random gear you'd find in someone's garage.
I certainly wouldn't advise *only* having that, but there's something to be said for a trickle power option powered by the local CO (even leaving aside all the other reasons a land line is still good).
My advice? Do everything. Put so many conduits in your house that it looks like a giant Habitrail, ensuring you have both star, bus, and per-floor-isolated topologies. Use smart or breakout outlets at first, but keep your options open.
Depending on your budget, fiber should be considered (and definitely at least accounted for in turning radius/pinch point design).
Every room should have at least two distinct Ethernet drops, and one drop near the ceiling. Anything resembling a media room or bedroom should get an HDMI pull and RJ-11. Anything else being "hard wired" in (smoke detectors and whatnot) should be seen as an opportunity for another set of ports.