In a broad reflective piece on Apple's WWDC keynote, noted tech journalist Walt Mossberg made some interesting comments regarding a recent rumor that Apple was considering bringing its iMessage service to Android. Turns out that isn't happening, and won't be in the near future.
Speaking to a "senior Apple executive," Mossberg says Apple is happy with the 1 billion+ active devices it currently caters to, so it doesn't feel an immediate need to grow its user base by expanding to other platforms. It also still considers its iMessage service a major iOS-exclusive feature.