It is derived through quantum mechanics and via the Plank constants and black hole physics.
Basically any more information squeezed together would turn into a black hole.
Though ordinary (non quantum) thermodynamics limits information density well before this bound.
As to what happens in the next decades with the good old Silicon stuff. Well, nobody knows just yet, but 3nm is what anyone realistically talks about, and just sci-fi tech after that.
https://en.m.wikipedia.org/wiki/Bekenstein_bound
It is derived through quantum mechanics and via the Plank constants and black hole physics.
Basically any more information squeezed together would turn into a black hole.
Though ordinary (non quantum) thermodynamics limits information density well before this bound.
As to what happens in the next decades with the good old Silicon stuff. Well, nobody knows just yet, but 3nm is what anyone realistically talks about, and just sci-fi tech after that.