Eh, knowing myself and how cynical I can be at times, the Tree of Life appearance on the list might just be the result of a 'Malick buzz' since the film was released this past summer. I just always find it 'intriguing' when a brand new film makes a list like this. The Dark Knight had a nice cozy spot at 74 on our '08 list and then absent since then.
I like re-evaluating a film people call 'great' 3-4 years after its release. I'm not saying Tree of Life, some years down the road (maybe even next year) won't be on the list. I'm just skeptical like that when it comes to the shiny new stuff that heralded as 'the shit.'
'Time' is always the best evaluator of a film. That and Filmspotters.