Winston's Dreams

Winston's subconscious thoughts which the reader sees through his dreams, like his daytime thoughts, are always about the past or the future.  I find this especially interesting because Julia's thoughts are always on the present moment.  While Winston spends hours reflecting on and pondering the past, both at work and in his own free time, and wondering about his death, Julia couldn't care less.
In his dreams, Winston explores many memories and premonitions.  It seems like he has forgotten the majority of his past, especially his childhood.  Yet, once he dreams about his mother, "the cluster of small events surrounding it had all come back" (160).  It is strange how dreaming of a single place or person can bring back so much of what has been lost or buried, intentionally or not.  I was taken aback by how cruel he had been as a child; his mild manner throughout the book would have led me to believe he would have behaved in the exact opposite way.  His mother reminded me of Mrs. Parsons because she too seemed to be scared of our children and helpless in taking care of or controlling them.
Julia's reaction to Winston's dream also struck me.  I am constantly surprised by how little she cares about so many of the things Winston find important.  She is sort of an enigma to me; I can never predict how she will act or get a good sense of her personality.  I can understand her desire to focus on the here and now; however, I can't see how she really doesn't care about anything but the present, especially when it is deeply personal and concerns someone she is close to.  
I'm curious if we will learn more about life before and during the Revolution in the rest of the book.  I also wonder what will become of him and Julia because it is clear that this secretive relationship and lack of shared interests can continue.  I hope that we will because one of the thing that frustrates me the most in books is when my questions aren't answered and that seems to be a pattern in dystopian books.