This is something quite a few don't understand. Even flight simulator 2020's excellent mapping technology isn't suitable for elite, on account of it requiring a huge database storing all of the world in it (which will need to be hand edited to reflect future Earth - doubt we're going to see that happen any time soon considering rights issues). And let's not forget that falls flat at scarab/on foot scale anyway. And still doesn't actually have any link to game play.
Then we have some tech demo of a city builder in an entirely different engine, which hasn't even been used to actually build said cities for actual games at the scale Elite would require. It's irrelevant how cool the tech is for hand crafting entire cities, Elite would need entire planets being built by proc gen, not hand crafted, due to the latter method demanding disk space to store.
I'd love Elite to jump to Earth like scope in a future expansion but I just can't see it happening to any level of detail required to replicate Earth, the Moon, Mars and so on, and it's certainly not possible with the current engine, no matter what anyone here claims to cite as evidence to the contrary.
Maybe low/zero population earth like worlds could be done, giving us at least the opportunity to land on these planets where there's a low enough population that the infrastructures can be similarly crafted like we're seeing in EDO (with maybe one greater level of scale achieved, like roads/transport between settlements and more settlements per planet, representing a denser population).
That would be a huge scale expansion though and likely even more ambitious than EDO.
