My second step still stands :)
The unique data-point here is that we are creating these "mini brains". I'm not invoking a knee-jerk "sCiEnTiSTs pLaY g0d OMG!" reaction, but I will invoke Goldblum's Objection: "your scientists were so preoccupied with whether or not they could that they didn't stop to think if they should".
Like several others in this thread, I'm bemused that this passed bio-ethics. Drawing the line isn't entirely arbitrary, ethics panels do it every day. We already have the tools, but it seems that in this case we don't know whether to apply them, or which to apply.