Admitadely my favourite game memories were of sitting on a couch with 4 mates and going crazy on the N64. Every game was custom built for four player and we'd have half an inch of screen for each person. It wouldn't matter. We were having so much fun. Winner stays in and loser goes out. Every game the same. Conkers bad fur day, goldeneye, Mario kart, you name it, if it had 4 player on it and on the N64 we played it. Maybe as far as the gamecube sage this coninued. Nothing compares to seeing that raw pure emotion of distress when you thrash a person in battle on mario kart.
Strangely we never wanted more screen space. We wanted MORE screens to play 5 player snow board kids, 7 player diddy kong racing, it didn't matter. We wanted more mates in the room to have more fun. Nowerdays, the closest we get is LAN parties and well. Let's just say the cooler of my mates wouldn't be seen dead in them. Still. When a game like castle crashers comes out, my new foursome team together and go nuts. We went mental for splosion man. We were cathartic for brawl. WE DID IT! No matter what it was. So long as there was 4 player, we played it. No matter how big the map, we did it. More than all that we had fun doing it.
TVs now are big enough to give a generous 25 inches of screen per player. Why are producers so afraid of going co-op? If anything, it's what made goldeneye and games like it so popular. People could come round, play something, like it, go out and buy it. Job done. Almost a decent demo. Now, we don't get close.