There's a metric shedload of other ways to do this sort of thing, with various amounts of overlap and wheel reinvention. The Apple TV approach is one I recommend for someone who's already pretty invested in the Apple ecosystem. It's probably the quickest route to maximum versatility without going to a lot of expense or trouble. If you don't have least one iDevice and/or don't want to use iTunes for your local media, getting as complete a solution can be a little more complicated, though not necessarily more expensive and there are a few reasons why it might be worth the trouble.

[Raak] Sorry, I could have sworn I read your post as saying you intended to connect a disc player. Ignore HDMI cabling entirely.

[Stevie] I thought TVs all ran over HDMI these days? I do have a DVD player (other than my computers), but it and the TV are both so old they use SCART.

[Raak] You said you were going with a network-to-TV model. A smart TV will hunt for your network, ask for a password and then present you with whatever app-based interface it uses so you can start consuming content. No wires other than the power cable. You want to push a signal in over a wire, HDMI is the best way (but not usually the only way on a decent TV). You want to take the sound to somewhere it sounds decent (thin tellies mean small speakers, no resonant cavity and crappy sound) use an optical link (over a cable) to a soundbar for the most compact solution. You can buy a receiver later if you decide you need better sound.

I use wired ethernet for my smugsmart TV; no point in saturating the wireless network on a fixed device if you already have an ethernet drop nearby. It came with a separate WiFi USB dongle, which I repurposed on another machine after discovering it was a rather nice dual-band device based on the Atheros chipset. Netflix is all I use the TV's 'smart'ness for; I have played round with using it as a DLNA client but it's not nearly as nice as using the XBMC box.

I ended up buying a matched soundbar from the same vendor (Panasonic Viera), one that uses HDMI and connects to the ARC-enabled port on the TV, which means basically all three gizmos (HTPC+CEC running XBMC, TV and soundbar) can be controlled with just the TV remote. It also means if I turn off the TV and just use the HTPC/XBMC + soundbar for music, the xbmc mobile app can control the speaker volume.

It's all basically as straightforward and usable as it can get. If I were going to buy a Smart TV again I might get a Samsung or Vizio, as there's a Plex app available for both. Which is a whole nother topic. (I don't use Plex myself but it's what I'd recommend to pretty much anyone I didn't recommend Apple TV to, i.e. someone who doesn't have a houseful of predominantly Apple goodies already.)