i am at this moment building a new single story house.
things to keep in mind....
you dont need ducting everywhere for future use. i simply drilled my nogs and installed that blue packing tape as a draw wire , stapled to the bottom plate and the trusses for future needs.
you only need ducting if its in a tricky spot such as the outside corner of a room or where the roof trusses make crawling through difficult. Inside walls are easy to run in the future...outside walls are a *&$#.
make your media cupboard no more than 12 cable meters from your main TV, that way you can run things like HDMI and IR repeaters direct without needing baluns.
My TV in the lounge has:
4Xcat5, 3xRG6, 2XHDMI, 1X toslink, and 2X screened 4 core cables for IR repeater or something going to it. i also ran 25mm conduit with large radius bends to the L/R speaker locations and center speaker area so the speakers can be wired normally or Bi wired in future. then another 25mm conduit just for whatever.
Family and bedroom have loads or draw tapes in the walls to account for different setups/tv locations.
kids rooms only have 1X cat5 to them at the moment but can be easily upgraded due to having 25mm holes in the nogs and draw tapes. Media cupboard/switch/modem is in the garage corner.
run lots of 20mm conduit under the slab before it poured to all corners of the house..that way you can easily add garden lighting circuits etc without ugly conduit going down the outside of your wall. Also be sure to print out the UFB install guide and give it to your sparky. make sure he KNOWS you want the conduits installed for UFB. also the lead in trench will need TWO ducts...one green duct and one white one just in case the UFB guys arent allowed to run fiber in the green duct.
i have specced a KABA EF 680 front door lock which is pin/prox and remote opening. i will hack the remote to operate off the alarm system remote so you can arm/disarm the alarm and unlock the front door and open the garage door from one remote.
if theres one thing you take away from this it is...OUTSIDE walls are a pain to get to in the future...install what you think you might need in the outside walls first or run ducts and draw tapes in there if accessable. The blue tape is dirt cheap and will make life soooooo much easier if you need to re-locate stuff. Use 25mm holes in nogs NOT 20mm.
Oh and get the builders to spec the roof trusses above your garage as attic trusses. that way you can store all your stuff up there...its the cheapest storage area you can get.