Cinema is safe from the optics point of view as achieving some of the effects of large sensor + large lens is impossible with a phone size camera. But Apple has it cracked and they could easily crush that market. They have a great sensor with enough resolution per inch, great dynamic range, ability to produce lenses with super low defects and have enough processing power. Sensor wise ~100 megapixels should be enough to replicate fine grain of a good movie film and iPhone 15 sensor's dynamic range of 12-14 stops is on par with film already.