My guess is this gives Google a clear migration path away from Java to a unified Chrome OS for phone, tablet, notebook etc. PNaCl could coexist with Android apps until Google finally phases Java out.
I know everyone loves to hate on Java, but I'm always amazed by some of the wacky things people say ...
Dart[1] is high-level, and has a clean, fast VM implementation. Also, ARM support[2].
[1] https://www.dartlang.org/ [2] https://code.google.com/p/dart/source/browse/branches/bleedi...
1. http://thenextweb.com/google/2013/07/17/google-is-holding-a-...