The Xbox store listing for the demo of Just Dance 2018 has gone up, and the description of this listing advertises two PS4 products in the description. In the image below, you can see in the description that “The Just Dance 2018 Demo is also compatible with PS Move/PS Camera” which are the two PS4 products and obviously do not work on the Xbox One.

It looks like the person who approves the Xbox store listings had hilariously missed this one.