I doubt that easy languages will disappear. Instead, compilers will get smarter at compiling/synthesizing low-level/parallel/distributed code from high-level languages/specifications. See a lot of the recent work out of Stanford on domain specific languages with Terra [1] and its derivatives (e.g. Ebb [2]) as well as Delite [3].
There already is a "reversal", to some extent, in that statically typed languages are making a comeback.
However, the performance of dynamically typed languages has also improved a ton. It's not unrealistic to think that you could write simple JS code and get about 50% of the performance of an equivalent C function, possibly more.
In the long term, there may be a reversal in the trend towards "easy" languages.