He is actually exploring the development of a new language; see the DOT (Dependent Object Types) paper: http://www.cs.uwm.edu/~boyland/fool2012/papers/fool2012_subm...

It will be based on Scala, and similar enough that, if things work out, we could have Scala.next without a Python 2 to 3 glacial transition.

Of course, Scala 2.1.x branch is making great strides as is, and AFAIK, the DOT language is still a research project, so not likely that we'll be seeing Scala.next anytime soon.