You can do that too, but that can be kind of annoying depending on what you want to do. Sound bleed was always what irritated me, you generally have one sound output so if you’re playing a game while your pumping stuff to your TV both sets of sound are coming out both places. DLNA sharing avoids that problem since the TV only gets what you’re sharing. Plus of course you need the PC and TV within cable distance of each other, which anything going over the network avoids.
Actually its quite simple.
You hook the cable up and you are done. If you want to get real complicated you can buy a 2nd cable "type Optical" and hook it to your surround sound system. I have a wireless keyboard and mouse and we got a dedicated Windows box with a BlueRay disc drive and then loaded the box with several 2 and 3 TB hard drives. We buy used BlueRay and regular DVDs and rip them to Hard drive (Same with music) and thus we have a dedicated computer entertainment system that also streams all the youtube and free media. The whole thing cost me less than 3 months of our previous cable bill and most everything we watch via the internet is free or waaay cheaper than paying for internet.