We have come a long road to establish transparent protocols to run stuff on our browsers (HTML, JavaScript, CSS, JSON, HTTP protocol), yet we are going to towards compiled binary code, towards black-box schema.

The users will have less power of the content on their browsers with compiled code and something like ad blockers become challenging to implement again. I'm not really big fan of this trend. For example Google Docs is being rewritten to use canvas and who knows what it actually does behind the scenes.