With so many people quitting, I'm gonna have to make noobs just to have someone to PK.
Seriously, the way I see it two things will happen:
1. CP will rule and gold will be inflated and not used other than buying stuff from NPC and fixing equip.
2. CP & Gold will co-exist and junk items (ref/uniq/elite & norm gems) will sell in gold while CP becomes the major currency for any worthwhile purchase. You won't be able to buy DB's for gold anymore and eventually gold will fade into the sunset.
Outcome: CO now controls the market prices, no more crazy prices on stuff and DB's will always stay consistant, soc items will become more common but won't be able to buy with gold.
Meantime: People are not sure how to translate gold into CP, on my server they are taking yesterday prices for DB's and converting it to CP. Most people are still selling gold not CP.