Lighting automation doesn't require network cabling, but home automation can be a fun and compelling snowball and having the cabling in place when it's cheap and easy to install might make a beautiful opportunity down the road to add a novel component to your home automation. Also consider running a few empty conduits from a central location to a few hard-to-wire parts of the house so you can upgrade your cabling to future technology almost effortlessly. Consider designating a few closets or cabinets as wiring hubs where you might later put some home automation equipment like an amplifier wired to speakers, a wireless signal repeater, a control hub, network storage, a second router, etcetera. These are the future hardware upgrades that are almost impossible to see now.