Yeah I'd love to know what this is aiming for over WezTerm, which already supports both WebGPU and OpenGL rendering. Maybe just that it is closer to being able to run in a browser?

I have to take a moment to just evangelize WezTerm a bit. I switched over from iTerm in the last few months and IMO WezTerm's absolute killer feature is its Lua-based configuration. You can do so much with it, down to running scripts on key binds, and the API is powerful enough to do virtually anything you want. For example I have some key binds that act differently when the active pane is running emacs vs. a shell.