If the PC version isn't getting it, I see no reason the PS4 version would. It just wouldn't make sense at all to make that feature console exclusive and I hate it that many developers actually have that mindset.
Well it seems like it would make sense to me, as consoles are more often played from the couch, thus encouraging more streamlined co-op. I know that games with split screen on PC exist, but I don't know anyone who's played them. It might become bigger once SteamOS gets off the ground, but until then it seems like the couch is predominantly dominated by consoles. I see where you're coming from though , as it seems like it would be 'relatively' easy to add split screen for pc if they already have it on consoles. So if they said no to pc, does that apply to all other systems? I hope not.
I feel that split screen co-op shouldn't get overlooked for consoles, especially for a game like KF2. It provides an opportunity for new players (aka friends/significant others who don't own the game) to be much more likely to be exposed to the game. If PS4 owners can simply plop down next to some friends and show them around and have them experience it for themselves, I feel like the audience for the game could be far more widespread.
This way they don't have to buy it, and can treat the session as somewhat of a trial. If they like it enough (which everyone will of course
) then they can go back and buy it on their console/pc at home. Or if they don't have that option or choose not to, at least they've become aware of the world of KF and will keep an eye out for it and future installments down the road.
Plus split screen with KF2 sounds like a goddamn blast. Non-stop hilarious good times, killing zeds with friends from the comfort of your couch.
It seems like a great way to advertise for tripwire.
Of course the arguments against split-screen arise: extra cost of development/potential loss of sales (people who just play it at a friend's house without purchasing it themselves), and optimising the game to share it's resources/downscale for a smooth multi-player co-op. Optimisation seems like one of the biggest costs of development time, as everyone would need to get stable FPS/ turn the eye candy down to make the game work when dividing its resource draws. Also progression might work strangely with multiple players on a single account, so that would have to be taken into consideration as well.
After all's said and done though, I'm sure tripwire would love to add split screen if it was easy, so the question is, would it be worth the time and resources if it wasn't? And if not at release, would that be something that could expand their sales if they add it at some point down the line?
EDIT: Just food for thought, but I for one don't own a console, and only play pc. That being said, I'd very seriously consider getting a console if split screen was an option.