It could hardly be more clear.

Yoshida said himself that gil is being redenominated. 1 decimal place to the left for all gil amounts in the game.

Not sure why there is still confusion on this.

That said, I completely disagree that this will have 'no impact'. Some wards pricing has been psychologically ingrained. It will be very hard to break. Prices will drop to match but not by 1/10th - no way.