They use the word "interactive" several times, and I kept expecting that to mean truly interactive i.e. the ability to open doors or pick up objects to use them

They use the word "interactive" several times, and I kept expecting that to mean truly interactive i.e. the ability to open doors or pick up objects to use them, but it seems that they mean "interactive" to mean "able to view and explore from a first person perspective". By that definition any 3D model is interactive.