You're comparing a telescope with an eyepiece now?
You know iPhone and iPad have 1080p camera in them, right?
And you know some laptops already have 1080p camera in them, right?
It's not about optics. It's about aesthetics and economics. For all the pretense about the ability to grasp basic physics, you seem woefully inept when it comes to comprehending the gist of simple arguments.
So, serious question: Would you be happy if the screen on a MacBook was as thick as an iPad ?
Because with current technology, that's really the only the option to get a decent image at that resolution.
And of the other laptops with 1080p camera they have one or more of the following issues
a) Bad decent performance without great lighting
b) Much thicker screens
c) Ridiculous camera placement
Outside of content creation or broadcast, I still fail to see the
NEED for a 1080p camera on a thin and light laptop. And if its content creation or broadcast, a built in laptop webcam is the wrong tool for the job anyhow regardless of the resolution.