Rooftop Hologram Gathering

In a futuristic cityscape at night, a group of people are gathered on a rooftop, gazing at a holographic display floating above them. The display emits a vibrant purple and pink light, casting colorful reflections on the faces of the onlookers. The city below is a sea of lights, with towering skyscrapers fading into the night sky. The image has a grainy texture, similar to a digital night vision shot, adding to the sci-fi feel. The scene is dynamic and full of wonder, with a focus on the interplay of light and shadow.