Oh good, even more barbed wire biceps, carp sleeves, black fore-arm stars, "tribal" patterns on white dudes, spiderwebs, hummingbirds, infinity symbols, and other ways for people to show how eager they are to express their "individuality"! Edit: Down-vote me if I offend your tattooed rebellious self-image, it's fine, but there's a real point to be made. This technology will lead to a lot more tattoos, and a lot more…
And also for not really thinking this through. When a medium doesn't allow for iteration, people tend to a) make obvious choices, b) make conservative choices, and c) end up with regrets. As our ability to iterate in software has improved, we've ended up with more interesting work.
My bet is that we will see more total tattooings but fewer tattoo-years of flesh, so I think there will be a net decrease in seeing boring and/or shitty tattoos. I think the ones that people renew and/or make permanent will actually be better because they'll be more likely to get their dumb and/or exploratory tattoos done with temporary ink that they'll eventually let fade.