This currency redenomination is primarily intended to reduce the excessively large values used in all transactions. We would like to reiterate that the effective purchasing power of your savings will not be reduced.
I would like to reiterate that lowering the cost of items from NPCs by 1/10th will not cause people to list items on the auction house for 1/10th of what they sell for now. People don't buy items from NPCs, so no one cares about that. Id also like to reiterate that this is a stupid statement, and there is no way you can predict how much, if at all, each individual items average sale price will drop on the AH.