When did they "affirm" that? They've said a couple times that "Java at this time is the only way to build apps," etc. They never ruled it out for the future, AFAIK. Please feel free to prove me wrong, but I would honestly be surprised if you found anything.

Having been to the last several I/Os where the question is asked at the fireside chats, the answer has always been "right now...". No one is saying dump Java, but if we could get some native hooks through something like Dart, that would be pretty awesome.