I don't think it is too unexpected/freak to discard the present concept of space and time. The question is what spacetime is. Could we think/experiment withouth the concept of spacetime? Loop quantum gravity attacks the problem mainly from GR viewpoint, while string theory attacks the problem...
In Einstein equation of general relativity, one side is stress-energy tensor and the other side is the Einstein tensor (functions of metric tensor). But the problem is in order to describe the matter field/stress-energy tensor, we have to use the space and time, which are determined by the...