Hawking seemed to have missed that the deSitter event horizon is in the future of the observer and therefore that Wheeler-Feynman advanced signals should dominate

also he does not seem to have the Unruh effect correctly? He says geodesic detectors should see the thermal radiation, but they do not accelerate relative to the local metric tensor field.

"The Unruh effect, discovered in 1976 by Bill Unruh of the University of British Columbia, is the prediction that an accelerating observer will observe black-body radiation where an inertial observer would observe none. In other words, the background appears to be warm from an accelerating reference frame. The quantum state which is seen as ground state for observers in inertial systems is seen as a thermodynamic equilibrium for the uniformly accelerated observer."

http://en.wikipedia.org/wiki/Unruh_effect

Also, use http://qedcorp.com/UFO/Cosmology101v4.pdf

this is under construction work in progress, no doubt errors and misconceptions that I will fix in time

The whole field is muddy on the physical meaning of the different coordinate representations in geometrodynamics

Even though we seek local frame invariants, some very real practical phenomena such as g-force in air combat are local frame-dependent.

http://current.com/items/89341431/the_science_of_g_force.htm

Eliminating g-force gives a decisive battlefield advantage as you probably are well aware.