The best quality for movies typically refers to high-definition (HD) and ultra-high-definition (UHD) formats. These formats offer superior visual and audio quality, providing viewers with a more immersive and enjoyable cinematic experience. The two most common high-quality formats for movies are:

1. **Full HD (1080p):** Full HD resolution has a pixel count of 1920x1080, offering a total of around 2.1 million pixels on the screen. This format is widely used for Blu-ray discs, streaming services, and Very high quality downloads. It provides sharp and detailed images suitable for most viewing setups, including large TVs and computer monitors.

2. **Ultra HD (4K UHD):** Ultra HD resolution has a pixel count of 3840x2160, providing approximately 8.3 million pixels on the screen, four times the pixel count of Full HD. 4K UHD delivers incredibly crisp and detailed images, making it ideal for large-screen TVs, projectors, and advanced home theater setups. It has become increasingly popular as more content is produced and distributed in this format.

The best quality for movies can be subjective and depends on factors like the size of the screen, the viewing distance, and the capabilities of the playback device. For smaller screens or casual viewing, Full HD might suffice. However, for larger screens and dedicated home theaters, 4K UHD is often preferred to take full advantage of the screen's resolution and enhance the cinematic experience.

Additionally, factors like the source of the content and the quality of the original production (e.g., cinematography, special effects) also influence the overall movie-watching experience. High-quality content with good cinematography, color grading, and audio design will generally deliver a more enjoyable movie-watching experience, regardless of the resolution.