Welcome in the Software patent world

McKool Smith,one of the US largest trial firms, is suing 12 computer games Editors/Developers for infringement of Patent #4734690. this patent is claiming rights regarding system which will allow to display 3D-like image on a computer screen. McKool Smith wish to ask money to all game developers which have created a game or a 3D rendering engine.
You think it is a non sense? you are not the only one. At least this trials will demonstrate how ridiculous is the Software Patent system, allowing patenting of anything, with broad claims...