Yes, the default capture output is a svg dataurl. But there many other export options. This lib was made as an internal tool for another project called Zumly that is zoomable engine and the svg format was the faster output I found. But then I realized that could be an independent tool like html2canvas
I really hope there will be, but it's still experimental. If it works well, I think there could be use cases such as dashboards, home automation UIs, charts, or even industrial line control.
Zumly is actually a spinoff of ZircleUI, the first project I ever worked on. Zircle eventually split into Zumly (which is still a work in progress) and Orbit, a CSS tool that makes it easy to create any kind of radial design.
Zumly seems to be really interesting idea - are there any real world examples?