I'm not sure that Haskell could, given time, subsume dynamically typed programming. But even if it is possible, why would it be desirable? Most Haskell people don't think very highly of dynamic typing, and the extensions to the language reflect that. They generally add more typing, e.g GADT's, multi-parameter type classes, extensible kinds e.t.c. And dependent typing is certainly not a move towards dynamic typing! Casting it as such shows poor understanding of both concepts.
