Citing from the Nature publication:
"The shrinkage of the part during the sintering process is isotropic and dependent on the solid loading (hence can be calculated; see Supplementary Information). The sintering shrinkage for stereo- lithography and microstereolithography does not depend on the scale of the sintered parts (for example, the honeywell structure in Fig. 1a with a solid loading of 37.5 vol% showed the expected linear shrinkage of 27.88% in height from 3.05 mm to 2.2 mm and width from 2.177 cm to 1.57 cm)."
"During a final sintering step at 1,300 °C the density of the brown part is increased (ρ final = 2.2 g cm −3 ) to that of high-quality fused silica glass with no remaining porosity and no cracks."
But of course these processes could be quite sensitive to hard to control parameters.
It's certainly a very interesting technology, and I think it could potentially be applicable to materials beyond glass.
It's been used for quite a few years already. Precious metal clay is basically this. You can 3d print with it, then fire it and it turns into solid metal.
From what I've seen in metals, there's a preference for powder bed technologies over binder technologies. But it's not like I have a wide scope of current industry or research.