If I understand this correctly, there's nothing to stop them from...

* rotating the projector instead of the tube to reduce distortion from resin movement (like in a CT scanner)

* speeding this up, using higher energies to compensate

* using multiple projectors at e.g. 90degree angles, to reduce time (and thus probably distortions through movement in the resin)

* using other wavelengths with e.g. more energy, or just better absorption properties for the resin

or are there any obvious problems with that?