Question: Can PS4 get hacked and possibly get CFW?
Answer: Most likely not cause PS3 was back when sony never heard of a so called "Jailbreak" on one of their products before, well now they should have learned from their mistakes and protected their PS4 with maximum security. But hey who knows some guy could come break through running and leak them then the scene will grow once again in a even bigger crowd than before. But again PS4 isn't even released yet.
LOL Sony knew abut CFWs all alone, and i bet someone somehow will crack it at some point.