Are spaces and objects fundamentally different?
We do not know. It depends on the theory we use. In relativity theory it is assumed that space is precisely objects that live in it. It is very deep assumption, which means that a set of objects makes space where they live while space geometry describes a set of objects in it. In computer science spaces and objects are also not completely separable because all spaces are implemented by normal objects. Since currently there is no theory which could explain the phenomenon of spaces and objects we simply assume that such a separation is very important. In other words, it is important to select the role of space and the role object.
