What does it mean that "...developers getting final add-on"?

[whitenack]

Engadget has an article this morning...

Google TV 2.0: app developers get final add-on for Android SDK -- Engadget


What does this mean. I mean, I understand what the article is saying, that this means the update is getting closer, but what is a "final add-on"?

Just trying to understand some tech lingo that is way over my head.

 

[jdbower]

Anything for an SDK is essentially something for programmers. It means that developers can now write apps for the next-gen GTV and the interface has stabilized.