Visualization seems to have stagnated in the AI craze era. Lots of androids touching holographic screens and what not, as metaphors for the almighty "AGI" coming any day now, but cant recall a major new development in the last five years?

One area that might be "pregnant" for some new approaches is the visualization of large datasets, eg large graphs. Extracting useful (and objective) information instead of ovewhelming with the sheer number of data points. That is indeed the art of visualisation.