No official article from Microsoft about this but it seems that they are planning to remove the Points system as a method of payment for credit cards which includes the official pricing of apps. This may be for apps, music, video for Windows Phone and 8 but I don’t if this is the same for games on those two platforms. Even weirder was that it has been widely used for Xbox Live and Zune Marketplace to buy various forms of media and applications. In newer builds of Windows 8, applications and media can be paid for on a credit card with the MS Point system being used as the second option so I guess that the system is not phased out yet.
In the meantime, the Xbox Live is still using the Microsoft Points system as a method of payment but this is all we have discovered on Neowin and Engadget with their original article taken from The Verge.