With the US Store having over 22,000 apps in their region,while the China store still leads with over 24,000 apps in their region for Windows Store.

The Store is growing rapidly with quantity as well as quality apps coming to the platform.Of the 35,000 apps almost over 95% apps are ARM compatible and all of them compatible with x86 and 64x platform(Intel based processors).
As we predicted,with this rate we can expect the 50,000 apps mark by the end of January or even before that,as the apps approval process gets faster after the holiday season.