I'm not following. Is there a particular market you feel isn't getting updates? I'm sure there are exceptions somewhere (I'm certainly no expert, I do firmware) but effectively there are no market-specific ChromeOS builds. A Chromebook is a Chromebook anywhere in the world, and gets the same images off the same internet as any other Chromebook.
Chromebooks are only relevant in the US school market, not "most popular Linux distribution in the world", unless we are talking about the usual World == US as in some sport activities.
