There is no way JavaScript can compare to compiled Objective-C. JavaScript is terrible as a "real" language. Sure, you can do cool things with it, but ultimately it's a giant hack. Objective-C on the other hand is a thing of beauty, as far as languages go.
Further, big companies and even small developers will want to protect their intellectual property rather than release it as pure JavaScript source for the world to inspect and copy.
Cliff
10 years Java, 8 years JavaScript, 2 years Objective-C.
Are you sure? I mean, clearly this Javascript fluid dynamics simulator is the future of technical computing.
Note: sarcasm.