I'll say in this thread what I said in another.

Drastically changing the time period of Zelda (in relation to the real world at least) is a cheap fix to a deeper, underlying problem.

Zelda is ready for change again. Change like the transition between LTTP and OOT. Real, gameplay structure change. Not a tacky gimmick to throw Hyrule some centuries in the future whilst still keeping most of the gameplay architecture the same. Why not go for some prehistoric Zelda whilst you're at it?

Besides, most signs point to Hyrule just sort of fading away in the future. Most Zelda games further in the timeline get bleaker and bleaker as far as population density is concerned.