With everything connected to the internet, from cellphones to toilets, communation today was very different from what I grew up with.
People playing video games with each other from the comforts of their own home is a very normal thing nowadays. I was never really an online player, mainly because I didn't have the right tools to do so, but during my NES, SNES and PS1 days me and my neighbors would go to each others houses to play video games. If it wasn't a fighting game of some of the few good co-op games, we'd go just to watch and help them play an RPG or a single player adventure game.
Local gaming is at it's best when playing a fighting game. Most fighting games in this day and age require precise inputs, movements and timing but when played online the slightest input lag can determine the winner from the loser.
Me and my cousin finally got to play Ultimate Marvel vs. Capcom 3 together and with me getting a 2nd controller just the other day was perfect. Here is the broadcast footage of the fights. We are in no way pros in this, you couldn't even call use casuals but we enjoy a good air combo or two.