Have a look at jdub's comment on the item about Ars Technical review of GNOME 3....

lucasr on April 7, 2011 | parent | context | favorite | on: GNOME 3 Released

Have a look at jdub's comment on the item about Ars Technical review of GNOME 3. He summarizes pretty well what will happen (or not happen) in Ubuntu with regards to GNOME 3:

  http://news.ycombinator.com/item?id=2419435