Last Slide of Brendan Eich's "State of JavaScript 2012":

First they said JS couldn't be useful for building 'rich internet apps'.

Then they said it couldn't be fast.

Then they said it couldn't be fixed.

Then it couldn't do multicore/GPU.

Wrong every time.

My advice: always bet on JS

The world readies for ES6.

See all of Brendan's slides.

See HackerNews thread.