These new Roombas are smaller and cheaper

iRobot upgrades its lidar-based robot vacuum line with eight new models. | Image: iRobot iRobot has announced a new line of Roombas, a year after it debuted its first lidar-based robot vacuums just prior to filing for bankruptcy . This week, it introduced eight robot vacuums that improve on its prior lineup and feature lower prices, some up to £200 (about $270) cheaper.