John saying with desperation “He’s got her chip. He’s got her" is just so meaningful because he isn’t in love with Cameron because she’s in that human like "body" of the cyborg even if the attraction at first was because of it. Without the chip, she is not Cameron and no matter even if he can invent a chip and put it into that body, it won’t make her Cameron. And while Charlie, Derek and Jesse refer to Cameron as "it" or "the metal" sometimes, John has never seen her simply as that. He has never lost sight that she’s a cyborg yet he knows she’s more. And this is why when he lands up in the future where no one knows him, not even his father or Derek and he sees Allison, he has hope because he thinks for a second she’s Cameron but then she plays with dog and smiles and his face falls because she’s not her. She’s not Cameron.