Game People, understand that this is fueled by money as much as any claims of innovation. The bottom line is that the games industry wants to force people online as much as possible. This allows them greater control over the product, fuels the development of online services run by each individual developer, and of course makes it easier to pimp microtransactions to those people while they are online.
I admit I'm not a big fan of split screen on the occasions when I do play multiplayer games, BUT I do understand the appeal and why it works. However from a game industry perspective they don't have much motivation for catering to your "on the couch" split screen or even LAN based gaming experience.
From their perspective if they force you online this means you need two people with compadible hardware, their own copies of the game, and of course them being signed up for your service so you can harass them with microtransactions, advertising, and of course have access to their personal information. Oh and yeah, there is the DRM aspect of the whole thing too, since it allows them to try and make multiplayer impossible without a real copy since your dependant on their online verification and such. I'd also argue (on an unrelated note) that I suspect part of the industry's obsession with multiplayer gaming, oftentimes at the expense of single player games/components is simply that it's relatively easy to force multiplayer online and try and verify it, while single player games are much easier to
steal and get the most out of by their very nature. To an extent I figure a lot of companies figure single player modes in shooters and such are amounting to a freebie for pirates.
Of course the central root of this problem is us gamers ourselves. In general we whine, we produce articles like this, and of course send in endless numbers of petitions. In the end though we still buy the products in a lemming-like fashion, and we don't even have any kind of organized consumer advocacy going. As a result we're pretty much an ideal group of sheeple primed for corperate exploitation. The whining and complaints effectively having simply turned into "buzz" for a game, since really they know no matter how much the community bleats, we're still going to generally line up to pay for our space in the trough line.
While a bit differant from "split screen", look at "Modern Warfare 2". MW2 is the best selling game ever. Yet the game sold like this despite multiplayer gamers being brutalized by the company cutting out features (dedicated servers) that they wanted. Basically people complained in massive numbers and went out and bought it anyway. Even worse, the first "Modern Warfare" title was frankly an unbalanced mess, people literally screamed about things like "Martyrdom" by the hundreds of thousands. Yet despite this, people decided to run right out and buy the sequel which they simply all hoped would actually be as well balanced as the first game was promised to be. Balacing games, whether computer games, or PnP RPGs is perhaps one of the most difficult things to do in game design. It shouldn't be any huge surprise that Infinity Ward really didn't bother to balance things any better than the first game. You even had Penny Arcade making jokes about how overpowered knives were, and calling people using certain weapon combinations "dog rapists". Not to mention the endless and ongoing complaints about Recons (and sniper classes in general in most games), and mortar strikes. Simply put, from a game balance perspective this is a poorly designed nightmare and everyone realizes it (despite staunch defenders)... yet there is no effort to fix this or balance the game via patches and such because simply put the company realizes it's not worth the time, they have their money, and frankly the bleating sheeple will run off to "Modern Warfare 3" when they decide to implement it and spend their money. They have no reason to think otherwise.
What I'm getting at here is that if gamers aren't going to turn on something like "Modern Warfare", the odds of seeing any kind of community rallying for split screen is more or less non-existant.