Or depending on the facts maybe closer to fraud in many jurisdictions. If Sony knew that they didn't have the right to allow customers to watch the content perpetually, but they intentionally deceived them by using words like 'purchase' to make them think they did, then perhaps in many jurisdictions this would be intentional deception to secure unlawful gain, i.e. fraud, on a massive scale.

If this was a genuine mistake on Sony's part, and not intentional deception maybe it is more a civil product liability matter (as long as they refund customers) rather than a criminal one.

Disclaimer: IANAL, not legal advice.