Water mist or water/alcohol injection into the intake manifold is not new. Here's some info about the injection from a performance perspective, but showing that there isn't any gain below about 3000 rpm. I can't recall the last time this engine was much above 2500 rpm's.
Misters are used in turbo cars for racing. Since it helps in cooling and fuel burn. There are the internal mist and the external misters for the intercooler. It's pretty much useless on a truck.