This is huge, it means that laser cutters will be even cheaper than they are now, and that much more ubiquitous. Laser cutters are already making their way into small scale shops and hackerspaces, this'll just hasten that. But it also has a ton of applications elsewhere. Likely it will lower the cost and increase access to the minimum set of machine tools necessary to sustain a developed economy, which has implications for the entirety of the developing world as well as further afield in things like Mars colonization.<p>Additionally, it makes things such as low-footprint or modular factories, configurable/programmable or wholly automated factories, and self-replicating factories more of a possibility in the near future.
Cool, but I wouldn't call it a single diode LASER since it is forming an incoherent beam from several diodes. Now if you could get a single, coherent beam at several kW, that would be really cool.