Hehe, yeah, imagine having several different species of mosses that your water would filtrate trough before reaching your faucet. It would for sure look really cool ;) Seems very unlikely. What we can hope for is for someone smart to be able to understand the mechanism behind how the cell wall removes the lead from the water, and maybe be able to replicate this mechanism in another device. If we could make something like that, then this discovery could potentially save lots of lives!