There's a very big point being missed by both the lawsuit and the comments on here that are along the lines of "why should you care?"
Backups depend on their independence. For those people who were using two separate cloud solutions to provide a level of resilience and independence, it's probably a bit of an eye opener to discover their approach of splitting their cloud storage strategy was actually irrelevant. If you're using iCloud as your primary cloud provider and S3 as a backup to that, you might be in for a shock in the event of an S3 outage when it turns out your iCloud storage was sitting on that all along.
So yes, it's important.