What is important about 3d GIS...

Over the past three decades Geographical Information Systems (GIS) has revolutionised the way we use spatial data   Until recently access to GIS was limited to those with the technical expertise and the relevant software, hardware and data   Luckily the Internet is opening up access to GIS by enabling 'web browser GIS' to be accessed by many more people. In many cases these people are exploiting this software without even realizing they are using GIS