Old Major's view of the future was a bleak one for the animals under Jones. He even predicted that Boxer would be sold to the knacker. His dream...

Old Major's dream of a better life for the animals was
"correct" in some ways.  Most significantly, I would say, there was no longer any
killing of animals for their meat.  Old Major talked in his speech about how most pigs
would be slaughtered while still young.  Napoleon never stooped so far as to actually
kill any animals for food (not even to sell to the outside for food).  So, in that way,
Old Major's vision came true.

But his larger vision does
not come true.  He sees a world where the animals all live together in harmony and
prosperity.  In his vision, there is true equality.  This clearly does not happen. 
Instead, the pigs take over and, by the end of the book, come to behave almost exactly
like the people who they had driven away from the farm.