Admit it. You want one of the newer full-frame DSLRs, or you bought one. It's inevitable that projection plane imaging onto electronically-read surfaces will continue to challenge chemically processed projection plane imaging, for the next decade, at least. Eventually, surface array imaging and life experience recorders will merge (with their own controversies and social impacts) and put the SX-70 and a DSLR into the same slot with Daguerre's camera, where they probably belong.
"Daddy, why can't I see the picture now?"
Apocryphal or not, the truth of this story continues to be played out as better imaging and display technologies are brought into being. Photography has a fairly short history of only a couple hundred years, so extending out a millennium or so, we can expect that quaint ideas like film, megapixels, and even eye-like lenses to eventually be overtaken by things far more powerful.
Meanwhile, artists, technophiles and others charged with the paying duties of recording weddings, products and news will turn to whatever is the surest, fastest and most reliable, within the confines of quality set by predecessors. Check out any 25 year old Popular Photography magazine and you can see how poor some things we thought were OK seem today.
This is a rental from EP Levine, a good place to go and check out equipment in Waltham, MA. Their staff, selection and rentals, and this D700, are excellent.