My first concern is fidelity - you can only get as detailed as the diameter of your laser, which I imagine is pretty big relative to the tiny features on PCBs. A 10 mil diameter sounds pretty good for a home job to me.
How well does cured resin hold up to copper etchants? I would assume pretty well.
What benefit does this have over other methods, such as transferring a laser print on glossy paper to a blank PCB? The resin/laser method sounds very similar, but more automated and essentially the same, minus the transfer step.