What are some major differences between the original play of A Raisin in the Sun and its 2008 movie?

There are not many differences between the film and
Hansberry's work.  Part of the reason of this was that the director and the actors
simply revived the roles they were doing in their Broadway production of Hansberry's
work from 2004.  Outside of the obvious differences in translating any theatrical drama
to the screen, I think that one major difference was that Hansberry's work seems to
imply a great deal of doubt and insecurity that the 2008 film lacked.  There was an
evident "preachiness" or sense of the didactic in the 2008 version that was noticeably
missing from Hansberry's work.  Part of this might lie in the time period.  Hansberry's
work articulates a condition that is really uncertain.  At a time in American History
when Civil Rights was still a dream, when segregation laws in the South and covert
racism in the North were palpable, Hansberry's arguments were radical.  They were
groundbreaking because their assertions were rooted in the fundamental belief that doubt
and insecurity shrouded any hope of affirmation.  This is not as evident in the movie,
primarily because, of the time in which we live.  For better or worse, there is a
greater sense of racial equality now than back then, making Hansberry's claims seem more
didactic than what might have been their original intention.  The very fact that the
film can draw stars like Sean Combs is another indication of a different cultural
valence between the time of the film and Hansberry's context.