My guess is the viscosity of the eliquid will be an issue. I predict lots of gunking up and cleaning issues if it works at all.
Most all the medicines we nebulize in the medical field are just about water-thin, and diluted with about 85% normal saline water. Also, there is a very specific and relatively narrow micron particle size range that is even able to get to the vast majority of lung tissue, and while piezo elements can be adjusted for amplitude (amount of vapor), most are not adjustable for frequency, which is what determines particulate size. Just my 2 cents worth, and I hope technology continues to progress to make these ideas possible.