Not sure if this has been posted here (I did a quick search but couldn't find anything)
www.bizjournals.com/orlando/news/2019/12/12/universal-patent-aims-to-further-refine-harry.amp.html
Essentially the patent indicates Universal could make all wands interactive, even if they don't have batteries, chips, or lights. This would make them more cost effective to manufacture (and hopefully sold at a lower price). One picture shows riders in a car using their wands to interact with ride props.
Not every patent becomes reality of course, but I could see this coming in time for Epic Universe and expanding to site A.