Creating a 3D scene which REALISTICALLY shows all objects from all possible camera angles is approximately 1 million times as hard as showing it from one angle. (My rough estimate may be a bit optimistic -- it might be infinitely harder
) So, if MA3 took 3 years, MA4 will take 3 million years if it is to have that feature. There will always be those who try, but their 3D scenes will never be mistaken for reality.
At least until the technology improves to something like the Star Trek Holodeck level. (But then, that thing was always causing trouble...)