Can General Relativity as geometry be just a classical limit or an effective field theory which can someday become like newtonian physics?
That is, supposed just for sake of discussion, experiments could someday be shown that gravity could be shielded. Then gravity is not accurately modeled by geometry and we may be dealing with some kind of actual field or quantum version with something that is not spin 2 but higher spin that can produce extra degree of freedom? What spin should it be to produce gravity shielding for example?
If so, then General Relativity can be shown to be just an temporary thing based on certain symmetries for spin 2 and doesn't really describe the real world. Does anyone object to this? Or do you believe gravity is geometry forever and ever? Thanks.