Even if you don't get "real" MIT credit, a certificate of completion from some of the courses is worth more than credit people get at some universities.
In the technology sector, sure. Here we do not even concern ourselves with credentialing to begin with because the work we do is out in the open and easy to evaluate.
Other industries, however, are not so lucky and struggle to sniff out the unqualified even with a strong credentialing system. I'm not sure an evaluation of determination helps them any more than what they have to go on today. People determined to get the job will always find some way to slip through the system without any real understanding of the underlying fundamentals.
With that said, I think MOOCs open up a whole new way to find talent, which could make the entire idea of credentials a thing of the past.