Here you go then.
It depends on what you are trying to achieve. Modern HD TVs these days already come with a multitude of inputs and outputs of all descriptions. If you intend to use your TV as the hub for all your devices then you will need plenty of inputs. However, if you intend to use a stand-alone surround sound processor then you would connect everything – blu-ray, Sky box, games consoles, computer, etc. – into that. You would then connect the processor to your TV using just the one HDMI input.
I use a variation on this and connect my Sky box directly to the TV via HDMI rather than go through the processor. This allows me to listen to Latics away matches on WISH via the radio in my processor whilst following the updates of all the other matches on Sky Sports.
All by remote of course so I don’t need to interrupt my attempts to impersonate a beached whale from my vantage point on the sofa.