As opposed to 'right-click, close other tabs'? Not easier, and not faster, sorry.
Close to the right I've never used, however, but I can see how it'd be useful. My chromebook is slowly becoming more and more irritating to use, the worst offender being the constant tab reloading whenever I switch tabs back and forth with no option to turn it off. Memory usage has rarely ever been a concern, but it keeps dumping them as soon as I switch tabs anyways. Irritating. Makes me wonder who tests new changes in regards to usability.