The dead linger is a game in development which will supposedly focus on survival horror rather than a left 4 dead/ dead rising kinda thing where you press a button and you murder every zombie within a 10 mile radius... (okay, maybe not that much, but you're still pretty powerful).
There's no actual gameplay footage yet as the game hasn't been in development for too long, but it sounds like it will be a little like dead island with resident evil. At least that's what i presume it'll be like...
It also sounds like the world will be randomly generated similar to minecraft, so i guess you wouldn't expect the same thing every time.
Basically, it focuses more on realism (not to the extent that it will ruin the fun, but still pretty realistic), and less on you killing millions of zombies in a few hours.