It's not really about the remote IDE. It's about an integrated environment where the agent can do everything it needs (install OS packages, inspect the code, view the app via a browser etc) in order to build what you want. It could end up being the place you 'start' an app, before exporting it and fleshing out the features locally.

So the primary benefit over any other AI agent IDEs is it has access to a browser?

Ya I really am not the target demographic for this since I don't use AI agents in my IDE anyway.

It does seem to perfectly fit fly.io in the sense that I also don't care about "edge" apps.