Why buy this, when I can get a 32 core, 64 Thread AMD Threadripper CPU, Nvidia RTX 2080Ti, 64GB Quad Channel DDR4 RAM and 1TB Samsung 970 PRO NVMe SSD? All watercooled and silent and in a moderate size mid-tower case and still cheaper or equal to overpriced Apple products and way way faster at everything than best Apple can offer!!!
1)Sensor and lens. 2)Codec.
1)Current smartphones have sensors that are not suitable for cinema. They have lots of distortion in their lenses. (My Samsung S6 Edge+ for instance). And they have jello effect. It should have global shutter and a proper lens.
2) I personally want a non GOP h.264 based codec. Almost all mirrorless cameras and DSLRs (Sony, Panasonic, Canon) use h.264 based codecs and they are not fit not the cinema and color grading and include lots of compression artifacts. At that price range, give us at least 10 bit ProPres 4:2:2 or bust. If technical limitations arise, then I could live with 1080p restriction, add ProRes option but make it 1080 only. No need to mention a histogram, false color (marshall), clipping meters, focus peaks etc...