The EMPs of sci-fi movies that destroy every electrical device with extreme prejudice are just that science fiction. Most of the damage from an EMP comes from inducting a large enough current into a circuit to cause arcing between two lines that damages or destroys one or both of the lines or causes a permanent short circuit by fusing the lines together. Inducted current is directly related to the surface area of the line, thus devices with antennas and devices connected to the grid (particularly the transformers connected to high voltage transmission lines) will the the hardest hit devices. Small electronics, laptops, tablets, etc would be far less effected, though not immune.