Few things here.
1) ForkTongue's thread about controllers was created back in December of 2012, but was recently "necro'd". Between your comment above and your participation lately in that thread, I'm guessing you didn't notice that (and it wouldn't be the first time you've made that mistake on this forum).

2) Split-screen support is hardly a console-only feature. Lots of PC games provide it, including Left 4 Dead 2, Portal 2, I believe all of the LEGO games (Marvel Heroes, Hobbit, Batman, Harry Potter, Star Wars etc), Lara Croft and the Guardian of Light (fun game, glad they're doing a sequel), Trine 2, Kane & Lynch, Dungeon Defenders, Resident Evil, Dungeon Siege 3, lots of racing games, sports games.. seriously, way too many to mention here as a complete list as I'm sure I'd forget some.