I can see a substantial time investment in the software and possibly the controller hardware, but unsure of what type of laser and power would be required. Below is a link to another video interview with more detail about the process where they talk about burning off the copper without damaging the substrate, perhaps this requires a balance of high power and high speed.
Watch "LPKF ProtoLaser S: PCBs at the Press of a Button" Video at Engineering TV
What part do you see as cost prohibitive, possibly the type of laser used?
Mike