You will have the official answer normally at the end of this week: "what news in V4" ;) (dixit Michael)
else
64 bits (so big files)
SubDiv (possibility to import format OBJ - Polygonals files)
Dimensions (even in 3D)
...
Seems it's writed V4 for educational version even the adress show 3.0 !!! https://www.studica.com/us/en/MOI3D/moment-of-inspiration-3-0.html