Of course, the research isn't there yet to create entire electronics that accomplish this (will it ever, safely, be?) but the team has created a chip made on silk that dissolves when sprayed with water.
"You don't need your cell phone to last for 25 or 50 years," John Rogers, a professor of Materials Science and Engineering at the university told AP. "Nobody wants to keep it for that long anyway."
True, but no one wants heavy metals and other weird stuff entering our soils or groundwater either. Sometimes the idea of disposable, or dissolvable, sounds like it comes with more potential problems than the one solution it provides (less waste) is worth. If this technology is aimed at consumer electronics, it is simply a band-aid solution to a bigger problem. But... that's another post entirely.