Any question answered...

I've got the living room with the following:

1. Big TV (50 inch)
   
2. AV receiver
   
3. Sky modem
   
4. Airport Extreme
   
5. Blu ray player (wired to network)
   
6. Sky box (wired to network)
   
7. Apple TV (wired to network)
   
   

This gets used mostly for watching sport, Sky+ programs & netflix. The Apple TV also gets used quite a lot for playing music through the floorstanding speakers

Then we've got the spare bedroom which has been turned into an "office" / gaming room. It has:

1. Smaller TV (37 inch)
   
2. Airport Extreme
   
3. Sky box (wired to network)
   
4. Apple TV (wired to network)
   
5. Xbox One (wired to network)
   
6. Wii U (wired to network)
   
   

This gets used mostly for gaming but the Apple TV is there for when either one of us want to watch something different to the other (usually when sport is on the big TV).

The reason they're wired is that the Sky Box doesn't have a wireless connection so I bought the extreme for that. It then just makes sense to wire the other connections to it for simplicity. That way, I can swap things in and out of the cabinet and not have to set up wireless connections etc.