Is 3D really needed

Actually I do think that 3D is not just something that can be called luxury anymore.
As Jeff Winston, The Use of 3D Visualization in Planning and Design—Is 3D a luxury or a necessity? The 3D world can help to make decisions easier or can help people to have a better understanding of a "hidden" or no existing world, that at the moment is just virtually available.
In addition many inexpensive tools are available to share these 3D models that are created.