That was a sleek demo, good job! Only thing that I could nitpick is if you polished your floating toolbars to look a bit more Apple-y, this feels like something Apple is going to be sending you an acquihire for.
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Of course I have a demo vid: https://www.youtube.com/watch?v=c_fq0TzlsXI
This will be my last post to HN about this. I always like to try a few titles to see if any hit.