As a someone with a Masters of Fine Art in painting, I can tell you there is not a lot of interest relating to art.
First: "Our hypothesis is that painting ... can be seen as optimization processes in which color is manually distributed on a canvas until the painter is able to recognize the content" is off base
All the lines in all the work are all the same length and thickness. Almost no artist simple distributes color. Artist chose details and focus.In this case David is being helped because it is using composed photography to copy.
Second: Even if they could get close to copying human style, it is not that interesting precisely because it is following an algorithm. The idea "the machine might enable new techniques since labor plays no role any more" is pretty weak. Artists typical employ computers to do what a computer does well, not to imitate humans. It is quite possible someone will actually do precisely what the authors suggest and use the machines ability for work without rest. There are always artist who find ways to use tools in new ways or to use them to make commentary on the process. This puts the robot in the same league as a chainsaw for carving wood, or paint that drips down from a rope.
As someone who as worked with machine learning a bit, there is not a huge amount of interest here either.
All in all it was probably fun and interesting to work on, but not all the interesting to read about or watch.