From the article,

The present work demonstrates that it is now practical for patients to undergo a single MRI scanning session and produce enough data to perform high-quality reconstructions of their visual perception.

Such image reconstructions from brain activity are expected to be systematically distorted due to factors including mental state, neurological conditions, etc.

This could potentially enable novel clinical diagnosis and assessment approaches, including applications for improved locked-in (pseudocoma) patient communication (Monti et al., 2010) and brain-computer interfaces if adapted to real-time analysis (Wallace et al., 2022) or non-fMRI neu-roimaging modalities.

As technology continues to improve, we note it is important that brain data be carefully protected and companies collecting such data be transparent with their use.