Yes, I will have a test session today. I just had a quick run yesterday and it seems that the smartphone app collects the information correctly. It states that Kodi is playing a certain movie (didn’t get the cover arts as you mentioned but it is no kind of showstopper). I will continue today.
Regarding the dashboard, yes, you are absolutely correct. One should see the movie on the TV screen, not on the dashboard!
However, I have two kids that loves their movies, which they often watch on their own devices. It would be a nice feature to present on the dashboard. For instance, this device are playing this movie with this progress. I know that this information should be available via the Kodi Web Interface, maybe it is a small task to retrieve that information easily.
Maybe @Bas who is the father of Homeydash is interested in helping out? Anyway, I have full understanding and respect that this is a bit time consuming to develop, please see this as a tip or suggestion and not as a feature demand/requirement. I am happy with Kodi app as it is of course