If you plan to have one Connect feed four pairs of speakers, you will need some kind of impedance matching in the chain to keep things stable. The Connect handle up to 4 ohms, so if your speakers are 8 ohms, then 2 pairs is done easily. More than that, you should look at speaker selectors that have the impedance matching function. Unless your VC's have them already, in which case your speaker selector can be a basic one. You will also need an internet connection where you place the Sonos unit. If you don't have one, you can get their Bridge unit.
One caveat - once you use Sonos, you will most probably give up any thoughts of other systems! It rocks!