All that is required to defeat something like this is “prior art”, which would be any example of a 3D tequnique that is similar that was created and used prior to the patent.
If I recall, there were tons of “3D” games that used camera views before 1988. All done in software. “F-15 Strike Eagle” for instance? Universal Military Simulator? StarGlider on the Atari ST? Friggin “Battlezone” from 1980. Now, if it really is all about “movable cameras” then I’m an idiot and this is all moot.