What I love about Cilk Plus is that it gives hands down the best performance in multi-core... And is very simple to use at the same time, you have to remember just 4 keywords and what you can do with them...
Btw, I am just a user, not a marketing guy It sounds like it.
Cilk has the same functionality as OpenMP. If I insert OpenMP pragmas into my code and then feed this code to a non-OpenMP-enabled compiler, the code will still compile and produce correct results. If I port my code to Cilk Plus and feed the code into a non-Cilk-enabled compiler, it breaks. So anybody who needs portability (e.g. every Open Source project) can't use Cilk Plus.