Doesn't seem new at all, just like functional programming with lazy values. The new part isn't the async it's the visual programming of which there are others. Does incorporation async make visual programming different?
Yeah I don't think so that on its own the visual programming makes any difference (or even adds any value). The main point here is that the "visual programming" is coincidentally a solution for async programming.
The actual problem with async functions is mixing them with non-async ones. Having all futures/promises makes it easy. Now if the visual style could represent current mixed js code, that could be awesome for display and editing I'd have to try before deciding.