It is always better to go to the scientific literature than to read news reporting to find out what the potential and limitations of new technologies are. The abstract for this groups most recent paper (that I could find - June 2018) can be found here:
https://pubs.rsc.org/en/content/arti...h#!divAbstract
It is a very interesting technology but don't plan to ditch your
water maker yet. They expect the systems to be inexpensive, but to only produce 2.5 liters of
water per day (with good sunlight) for each square meter of collector area. Also the collector needs to be floating in
water. Saltwater is OK, but due to the need to reject
salt into the remaining water I think it safe to assume that you can't just have a thin film of water below the collector. If
storage were not an issue you could have some sort of fold-up or roll-up system with a large size that you might throw
overboard while at
anchor.