The main idea behind the software is to bypass difficult and expensive 3D modeling techniques, by using recent phenomena such as the widespread availability of high megapixel digital cameras and increasing PC processor power.
There are many companies producing the equipment and software to produce standard VR tours (''360 degree panoramic movies'' QuickTime[http://www.apple.com/quicktime/ , iPix Corporation, and most notably, the open source PTViewer [http://webuser.fh-furtwangen.de/~dersch/]made available by Helmut Dersch of Germany.
Another notable example of MotionVR production using Quicktime is WorldInMotionVR {Link without Title}