Discoverable, searchable, updatable, all the good qualities of a web app with the power and speed of a native app.
Of course you need HTML, JS, CSS and the whole web stack, but the good thing is everybody already knows it. Standards are good.
Apache is behind it, also Google, Firefox, Ubuntu, everybody benefits from a standard way of developing apps once, but very specially users, and coders.
It has to be the future, it will be no matter what, no barriers will be high enough that a great idea can not overcome.
"good thing is everybody already knows it" - so you recommend to learn something everyone else will know... I guess differentiation on the job market is not a part of this strategy.
"everybody benefits from a standard way of developing apps once ... and coders" - my feeling is that it's 50% of HN spirit is building things in different ways. Just look at all those awesome languages, libraries and frameworks coming out every week!
