Vishwaroopam works on a few levels. For fans of Haasan's dramatic performances, this is a good opportunity to see their star as three very distinct characters – actually, it is one man with three different personas.
The New York segments in the film, especially in the third act, seem dull, and uninteresting. Moving from Afghanistan, back to New York, the film somewhat loses its edge, and falls into the often narrated thriller structure – bad guys, good guys, cops, FBI, a dirty bomb and guess who will win in the end?
The cinematography, production design, sound design, costumes aerial helicopter shots, scenes of war, makes the situation very effective. Especially a 5-minute US army attack scene before interval.