I couldn't find anything solid to back it up (although admittedly I didn't search very hard), but apparently this also reduces fouling of the hull.

>air lubrication can reduce fuel consumption by five to 10 percent

I wonder if this is just the air lubrications system, or if it also includes gains from the reduced fouling? Either way, it's an interesting technology and assuming it works anywhere near as well as the marketing suggest I'd expect it will become a standard feature on larger vessels.