You only need a regular towel to dry off, since now you're actually clean instead of just smearing poop around until the paper kind of looks clean. Unless of course you have microscopic eyesight.
Agreed, you don't just throw the towel up on the rack and call it a day. Usually you throw it in the wash or wash it out with soap when you are done. But at least your bum is a lot cleaner than smearing poop all around it with TP.