No, resolution is not a substitute for focal length. You have no idea how opstics and focal length work. Lenses don't have megapixels. 2000 nits does not look awesome outdoors when there is tons of glare.The 48MP telephoto lens would be able to mimic a 10x lens. A stylus isn’t necessary and goes against the entire original purpose of the iPhone and they’ve had 2000 nit screens for three years now which looks awesome outdoors.
My brother's ancient Galaxy with 10x telephoto gets way more detail of a distant subject than my latest iPhone gets from cropping. There is also a different geometry to the perspective of an image from a different focal length.
A stylus would not defeat any purpose of the iPhone anymore than Pencil defeated the purpose of the iPad. It's just a tool that some people find useful for certain tasks.
Quit making excuses for the lack of innovation we've been getting from Apple. They need to be able to take criticism and not act like everything they do is automatically better and perfect.