HN title is a little editorialized, making it sound like a new browser standard. Should be edited imo The materials themselves also drip with exaggeration and hand-waving, talking about things like "the legacy cloud VM" (emphasis mine), "unmatched security", "spinning up the entire dev environment in milliseconds" All of this is aside from the actual technology, which could be cool, I have no idea yet. But it rubbed…
They are aiming to develop a standard... of sorts... https://github.com/stackblitz/webcontainer-core
The idea is to use the browser as the dev environment, all of it: emulate a file system, run non-JS tools compiled to WASM on top of it, and access networking via the browser, too. For Node-based development, this sounds rather doable.