Will OTA updates with tools like Codepush still be possible with hermes? I'm assuming these tools push the minified js instead of compiled bytecode.

Some newer HTML5 elements (Shadow DOM) are supported and some still have a ways to go. A coworker of mine wrote a great writeup about the state of the accessibility of the Shadow DOM in modern browsers. http://substantial.com/blog/2014/02/05/accessibility-and-the...

Been using the VOS bundle for the past year & it lints much more than just js. Def worth checking out.