I think it would be kind of cool to see what each console and game sold in the sub-regions of the Americas like Vgchartz has for EMEAA.

They could break it down into the following regions.

USA

Canada

Mexico

Central America

South America

Could this be a possible feature that's implemented in the future sometime?

My guess would be that there's a lack of info on areas outside the US and Canada. I would think that they might be able to do those 2 and other, but I'd imagine that with all the slush for data in Latin America, it's a lot easier to just keep it all together.

But it couldn't be that much harder then getting sales numbers from the Middle East like they do right now.

 3 letters can sum it up: NPD.