(Dimension) World Trees

This is a fairly odd idea, but would be really cool to see

The world trees dimension would have leaves as the surfaces of the surfaces.  Falling off of a tree would kill you, even if you had elytra to glide cause there would be a special block that no life can live on, thus forcing you to be careful and not fall.  There would obviously need to be more trees, so maybe rare structures could be there like a tree-houses village where the villagers (very likely different type of villager from the overworld) would be walking around on bridges holding onto ropes hanging from the branches.  Now, that would be a great place to gather TONS of wood, but there should also be some unique stuff there ranging from mobs to new ore, this would make the dimension exciting to explore and would make some pretty cool wooden caves.