The immediate benefit of CoffeeScript
All languages have their pros and cons. Some of these deciding factors are more superficial than others. Often the superficial benefits are what strike you first about a language. CoffeeScript for example has a really tight, sexy and expressive syntax that allows you to be concise consistently. Take this comparison of a pointless jQuery plugin:
Both do the same thing, but CoffeeScript definitely looks better right? Check it out over on GitHub. More to come on CoffeeScript sooooooon :)