We will now have EIGHTEEN POINT BUY in the Guild, and the highest score you can buy is a 16 (which costs 10 points). And the array that you can start with is now 16, 14, 13, 12, 10, and 8. If you currently have a character that is using 15 Point Buy, you can upgrade it to 18 Point Buy using these rules.
And as always, with Point Buy you can determine where your highest scores go and with the right racial choice guarantee you have an 18 in an important ability score. Neato, huh?