Because there should be.
Lost brought the concept of flashbacks back into prominence on TV prompting shows like the failed Reunion and Heroes to mock their format. Just when you thought they couldn't be anymore innovative they unveil the flashforward concept.
They're finally off the island and we had the 7 months to ponder just what is going on. While people liked the revived creativity in Season 4 I felt like it was a letdown set by this strong episode, but this two part finale sure did have its strong points. A great Desmond/Charlie storyline and Ben being beaten senseless.
Just a truly great two hours.