By iRobot's own admission, the Roomba 980 is its most important consumer product since the launch of its first vacuum bot in 2002. It builds upon the innovative brush-less design of the Roomba 880, but adds a whole load of new gear to make it a better robot. It can actually map your floors and make sure it thoroughly cleans your entire house. And it also marks iRobot's entry into the smart home arena -- the Roomba 980 works with the company's new "HOME" app, which allows you to control and monitor it from anywhere in the world. But like every new Roomba, it's pretty pricy at $899. Is it worth it?