Rubbish. They are just playing with semantics here. All they are doing is setting up a condition to create states of phased resonance within the light beam so that the resulting quantum statistical behavior /acts/ like quasiparticles or polaritrons, whose mathematical state can be manipulated to behave with certain "solid" and "fluid" behavior characteristics, which is actually impossible in the true sense since the light beam contains no bosons.
That said, there are still some interesting possibilities to this.