The Icedream Spin features Icedream soft serve hand-spun with your choice of fountain beverage, while the Icedream Float is a classic float made with your choice of fountain beverage and a swirl of Icedream.
If the test does well, it shouldn't be terribly hard to add the Icedream Spin or Icedream Float to the menu as both are made with regular menu ingredients using existing equipment.
Photo via Chick-fil-A.