Personally, I'm with you in your optimism about 2009-2010, and I'm actually pretty optimistic about next year as well.
Duke has a young team of players, all of whom will likely stay 4 years. Think about that. These are talented players, top recruits, who will stay 4 years. No one else has that. Think about the teams that "overachieve" in March, and how frequently you can trace it to experience - experience playing at the college level, and experience playing with each other.
The core of the 2008-2009 team will be juniors and sophomores, with a senior PG/SG and a senior "glue guy". Next year's team will be better than this year's. Unless Henderson goes pro after his junior year or Singler goes pro after his sophomore year, which I doubt, the 2010 will have a combination of depth, cohesiveness, and experience that is not likely to be matched by any other team in the nation.