With current technology, the rest of it is done to make greens happy and companies look concerned.
Although, there was an interesting article in Pop Sci this month about a device that used microwaves to recover petroleum products from things like tires and plastics. Basically, it's just gasification. Technically, it's not recyling, but it's better than putting them in a landfill - might be interesting to see if landfills could be mined? Per the article, it was an energy efficient process, as well.
Struck me as interesting.