Resurrection in flesh vs. heaven

[The Mikado]

Christianity made a gentle arc over the millennia from one to the other, that is, from thinking that the Faithful would be raised back up on Earth with new, incorruptible bodies at the end (see the countless early Christian tombs with the inscription resurgam, I will rise again) to the belief that the souls of the faithful would go to heaven, which had hitherto been seen as more of a celestial realm of God than an actual abode of the dead.  Thoughts on this change? 

[The Mikado]

On the other hand, resurrection does not depend upon a problematic split between the body and soul as separate entities, and it considers material existence to be valuable enough for God to redeem and renew.

This last sentence is really what inspired my original post.  There seems to be a strong infusion of Platonism into Christianity regarding the body/soul separation.  While an older-school Christian would say that his body and soul would be saved, the Heaven one would say some Platonic stuff about the body being the sinful, fleshy prison of the soul and Heaven being the soul's escape from its Earthly prison.  There's a pretty big difference there.