I just re-read the last-chapter, available through the link above.

I'm not quite sure what happened there, unless Orwell was trying to communicate the response of the now totally broken Smith to the Party's brainwashing. Is he drugged, hallucinating, is it a dream? What of the meeting with Julia, his rosy (relatively speaking) post-release life?

I don't really now what to make of it all, except that the Party has won. It has controlled his reality, created it for him. He has come to embrace that which he has fought all his life, that which has persecuted and victimized him. He is, to use the modern phrase, collaborating in his own enslavement, voting against his own self-interest, because to do otherwise would first require his recognizing his own self-betrayal--and Julia's.

Its all allegorical, of course, a metaphor for his own enslavement, now embraced because submission is easier than any further resistance.

Perhaps the clue is the wartime bulletins he watches on the telescreen. It's the same propaganda he's always watched, and used to dismiss outright. But now it has become his Mainstream Media, his Fox News, his Current Events. He actually believes it now, is involved in the outcomes, roots for his side. After the brutal, unflinching realism of the rest of the novel, this last dreamlike episode must signify something, must serve some purpose. It is Smith's epiphany.

I'll be honest, I don't really know what Orwell was trying to do in that last chapter. But I suspect he was successful.