I think Scala has the potential to appeal to the widest range of programmers.  There is something for everyone there, but without alienating any one demographic.  (You can write a completely OO app, or you can write a completely "functional" app, or you can mix-n-match.  And it does better than other languages that claim you can do both.)<p>Although I will probably stick with Perl and Haskell for myself, I'm looking forward to a world where Scala and F# are the "enterprise" languages.