Feral cats can become house cats again, my Jiskefet was born in the wild, living free with his mother and siblings untill he was caught at nearly 5 months. He was awfully shy and scared at first, but he is my only cat ever who turned into a true lover. He absolutely adored me, and the feeling was mutual.
Tosca was born in the wild, too, she is still a free spirit, only coming home to be fed, and roaming the park day and night. She does consider us her staff, though, and will report in whenever she needs food or help of any kind.
I am now looking after a feral cat who lives in an apartment and does not go out at all, she knows I mean food, and though she is supposed to be shy, she will be the sweetest, cuddlyest kitty, untill she has her food. After that I don´t matter all that much 