Most notable of the new features is the Runtime for Android Apps, which looks to be getting a Runtime update. Hopefully this will bring about a better experience for Android apps running on BlackBerry 10.
Where do I find these roadmaps?
You can check out the roadmap for your favorite SDK by visiting the following links:
If you were creating apps using the Adobe Air SDK, there is some bad news for you...
We’d like to take this opportunity to let everyone know that the on-device Adobe AIR runtime will continue to be included as part of BlackBerry 10 OS version 10.3, but will no longer be included as an on-device runtime starting with BlackBerry 10 OS version 10.3.1.
Source: BB DevBlog