I was stunned by this one - from the opening sequence on I was completed transfixed. The slow and melancholy pacing, the morose blue filters, the long silences and the fixed stares, all combined to create a spacious and powerfully - almost painfully - introspective viewing experience.
This is a remarkable meditation on the Zombie sub-genre as well, although clearly partaking of something quite well beyond that more limited scope. No corpse-eating ghouls here: just a fascinating "what if" that raises painful questions about what we do with death and the dead in our own collective imagination. In this particular return of the repressed, being forced to mull over the tedious, bureaucratic details of what would have to happen if hundreds of millions of dead people suddenly reappeared in our midst actually serves to engage the viewer in a very personal way. I found myself interrogating myself over and over about what kind of response I would have in a similar situation, and identifying with the film's protagonists on all sorts levels, and the experience was quite moving.
All the nuances of grief and mourning were shockingly subtle and well-conceived, as well as superbly acted.
The whole time I was watching I kept thinking: "Thank god for the French!" Such a movie could simply never arise from Hollywood.