Being "Smart Wired" is just having the necessary cabling for your current requirements and being able to accommodate a future upgrade generation or two. The typical setup right now is two coax and two ethernet to each room of your house, Cat 5E or better on the ethernet cables. This allows two video sources and wired internet and/or phone service to each room. Sometimes people put in optical in addition to the other 4 lines, but the hardware to utilize the optical is still more money than most people have to spend. Although it may be of some use in the future, I don't see a need for it for the next two decades at least since Cat 5E network cable is perfectly capable of carrying gigabit ethernet, and if you want to go all out you can put in Cat 6 and maybe get 10Gb network speeds in the future for a minimal cost, especially if you want to transfer hdmi over ethernet. I've read that optical can't handle full resolution soundtracks, so it may be a complete waste of money if true, unless you can find multiplexing equipment cheap.
I would recommend doing the standard dual rg6 coax and dual ethernet, prefereable cat6 if you can afford it, and ensure that everything is run in conduit with extra pulls so that if you do need to run new cable in the future, it will be easily accomplished.
