It's a good start.

 

The idea of taking atmospheric water vapor and condensing it to drinkable water is valid, and vialbe in some places.  The standard challenge of bacteria/mold growth like legionnare's disease is handled after the water is condensed.  Not before/during, so I wonder if there could be growth on the cooling coils?  How good do the filters need to be in order to be sure of what we're getting in the water?

 

I do think they are targetting the wrong regions of the world.

 

Most likely island economies where the humidity will be over 30% is a better place to start.  The areas that are currently desert, are desert for a reason.   Other technology that can work where 10% humidity exists are different/expensive.  But when you need water, you need water.

 

Notice that the amounts this can create is relatively low level.  Not enough for industrial.  But if we can get potable water to enough people, this might be worth it.

 

One 'challenge' to consider is how the use of these units will effect the surrounding region?  If everyone in a city was supported by this type of water extraction system, would it have the same impact that a "heat island effect" created by the same city does?

 

The expense is something else as well.  I'm glad to see this one as a start, but it is in now way/shape/form the right solution to the water problem.  It does bring us one step closer, however.