Indeed I thought a lot about that while working on the zoning. The HTD system by default can do 12 zones (with as many speakers as you want). I suspect it wo

Indeed I thought a lot about that while working on the zoning. The HTD system by default can do 12 zones (with as many speakers as you want). I suspect it would be rare to have more than 2 or 3 different sources across all of those zones, but it would be common to only want a few specific rooms have sound playing. The idea of a movable source device makes sense, and I suspect a very common use pattern will be playing something over airplay/airplay2 from a iphone. The zone splitting just makes it possible to have more granular control over where that sounds is going. I debated a lot about rather to install speakers at all, but I do want to be able to have some housewide paging/notification, and I would rather have each room have stereo speakers in the ceiling ( with a corresponding sub for some locations) then rely on a desk or table held speaker. Also, the cost of doing in wall is pretty cheap now if you are building new. Keep in mind it is possible in 3 years I figure out I did it all wrong, but that is the fun of home building. ;)