Giving up my email for a try is a no-go from me, but it's definitely a super interesting concept and, at least from the quick video, I could see this becoming fairly popular if the output is reasonable (and probably an adjustment on pricing -- I would not pay for it as is).

I think it would be useful for tattoo artists as well. I'd be totally on-board if my artist whipped something along these lines out on their tablet during a consult, we browsed through some designs based on my inputs, and then have my artist modify/add their personal touch.