Name me one game were that worked. Even No Mans Sky which put a lot of work into it with a large variety of assets starts to repeat after you visited like 20 systems. And even if the models are different, it still is “oh, another desert planet, just with a slightly different color palette”.
I have not a problem with procedural generation per se, i just do not believe it works at scale. To stay with NMS as example, there is no reason whatsoever to explore the universe or even switch to a different one because everything is just more of the same. There is nothing new.
It is running natively. In comparison to, for example, emulators that emulate old gaming consoles completely, Termux emulates only an input device, so basically a keyboard and a display, but the actual applications are Linux and run on Androids Linux Kernel natively. There is no emulation or virtualization happening.