Interesting also that even this article doesn't mention "DRM" anywhere despite the fact that this is exactly the worst case scenario DRM critics have always warned about.
(Personally I would consider DRM okay if Sony's behavior here was illegal without a full refund.)
This has happened since the beginning of DRM. I had a roommate who bought hundreds of dollars of music from the Walmart music store because WMAs were like 59¢ instead of 99¢ from iTunes. It seems like not even a year later they shutdown the store and the certificate expired and PlaysForSure stopped playing for sure. That was around 2003.
20 years later will anyone do anything about it? Of course not.
What is going to be the event that gets laws to change? Probably not a few movies viewable only from Sony devices.
(Personally I would consider DRM okay if Sony's behavior here was illegal without a full refund.)