Wine in cans are brilliant for ease of packing into an esky. No longer do you need to lay a bottle of wine on its side or be forced to having the esky lid remain open because the wine bottle is too tall (or your esky is too small!).
Similarly in the fridge you no longer need to find a spot in the fridge door, with cans having the ease of being placed upright on any shelf. They also take a smaller footprint so you can fit a couple on each shelf if need be without having to completely re-organise your fridge.