high-tech billboard mockup in a cutting-edge urban district, surrounded by sleek architecture, autonomous vehicles, and

billboard mockup city urban area densely populated panoramic cityscape modern rooftop historical buildings crowded streets people sky clear lighting visible distance environment vibrant bustling mix architecture dynamic signage advertising high definition scene visibility life living futuristic building tech savvy district dusk lights flickering sleek windows mirror surroundings blank illuminated ambient autonomous vehicles cutting edge innovative concept hd ai generated