Ten years ago, Americans said they couldn't live without their cars and clothes washers. A new poll by the Pew Research Center says people still can't live without clean clothes and their four-wheeled friends. What's interesting is the new stuff we can't live without. Cellphones, which didn't rank at all in 1996, were a necessity for 49 percent of responders. High-speed internet was a must-have for 29 percent and flat-screen TVs and iPods entered the list with 5 percent and 3 percent, respectively.