There were a slew of innovations in robot vacuums on the CES show floor this year, from arms and legs to extendable mops, movable towers , and new navigation systems. As the industry races ahead in its quest to find the best way to clean our floors, it can be hard to see the function through all the hype. I spent the last week in Las Vegas hanging with our robot friends to find out just how much better they’re getting. Here’s a look at all the new tech that came out and how it could help keep