Nice! I knew that the feature had been in the works and now the new Story feature in WordPress had been enabled. I quickly put it to use with some images from yesterdays, admittedly short and rather cold day trip, to the island of Hailuoto.
Immediately is obvious that the images should be in portrait-mode. Since you can see only about 30% of each image, here they are again:
NOTE TO SELF: Remember to resize/optimize prior uploading. That will save a lot of storage.