During the call you write down the person's phone number on a Post-It note and stick it off to your left. In your mind, you picture the Post-It and look over to see that it is exactly where you left it. That is the spatial map that we all have in our heads to keep track of this database called the world. VRML is the key that will unlock the power of this natural ability to organize the current chaos of the Web. The current metaphor for the Web is starting to break.
Most people have a bookmark list that runs off the bottom of the page.
Also, take a peek at your monitor, most of us have multiple application windows open and are constantly trying to shuffle around to get to what you want. These problems are inherent to organizing information on a 2D surface. There are only so many pixels to go around. With 3D if you need more space you simply move forward, or you turn your head. In 3D you get infinite screen real estate for a finite number of pixels on the monitor.