HTML is a terrible way to build applications. All these complex approaches have failed miserably on a technological level. Why are Mozilla even bothering to "solve" all these supposed problems? There is nothing new here. You can build anything you want in a simple virtual machine or sandbox. And yet we're going to get all this stupid application-level nonsense as the bottom level. It's like people are eager to repeat the mistakes of operating systems and plugins, except this time the complexity will be in the standards. Give the power back to the programmers.