In my opinion, the most important thing to get right is conduit and access panels. I see no likelihood that networking technology will become entirely wireless, especially for buildings with sections of reinforced concrete, so there will be a need for wires or fibers even if the majority of network traffic is wireless. But over time, both wired and wireless technologies will change, so you'll want to be able to pull new cables/fibers/low voltage power as well as new and as yet unknown stuff. In the US, 2" PVC conduit is about $3/foot. For sure you'll want big conduit between floors. Go to some effort to keep bend radii at several inches or more.
Whatever wireless technology you choose, it will work better and faster with wired backhauls. This is important to make sure that portable devices maintain wifi connection as you move about the house or floors.