Seconded. I already told my wife that if and when we'll be moving to a country house, I want to have walls made like on starships in Star Trek - with space in the walls through which cabling runs, covered by disguised access panels that can be taken off.

(I'm not sure she fully understands how serious I'm about it, and the extent to which I want to push it. I want them across the whole wall, i.e. so I could, if need be, reroute any cabling throughought the entire floor.)