It seems like the discourse over a unified Einstein and Quantum Gravity disregards the phenomena encountered in our local observable universe, such as we find throughout the Intergalactic Medium. One example: Is the Density Difference between our solar system and space itself beyond the heliosphere (as Voyager left the solar system).
In the models attempting to unify Einstein and Quantum Gravity, shouldn't this be a consideration?
Would the attributes we find in the IGM/IPM help to unify the two?