Steven Soderbergh would like a word with you. https://petapixel.com/2018/01/30/steven-soderbergh-shot-late...
Pros increasingly don't use DSLR nowadays, the use mirrorless cameras.
That nit, aside, it's not about replacing DSLR/Mirroless FF cameras for Pros (which it will never do).
It's about having great video/picture quality for the average user and the ocassional pro use (which it does).
I have used it in pro contexts, as have many others (including several prime time TV shows and even movies). For photography it's even more of a non-brainer...
But I work in video production and I can tell you that for 99% of people, there is absolutely no reason to buy a separate camera.
What Apple and other smartphone makers have managed to achieve in such small and (relatively, compared to a full frame DSLR) inexpensive items is pretty amazing.
They have such good quality that when I need to grab a quick pickup shot, I can easily use my phone's camera and drop the footage in with a pro cine-style camera. There are tons of apps that will let you shoot with full manual control or even flat color profiles.
People have shot entire, commercially released movies on their smartphones. Once you get to a certain image quality, it's not about the image quality but the artistic content/merit of said image.