Forget the "roombot" how about the self fueling flyswatter?

That would seem to be the next step in the evolution of "ECOBOT"

Once you get past Ecobots II and III, task for Ecobot IV:

Work on mobility, add an attractive flystrip, to this machine, and you have a self propelled, and self fueled flyswatter, yes? But what to do about the er...waste? Potty train? Heh. That's a heck of an AI project. Move over "Turing Test" make way for the "Toilet Test".

Hat tip to the always interesting blog, Accelerating the Future