This idea looks like the consumer version the ever-growing trend of object-based storage in the cloud. As storage sizes continue to increase and the amount of data we store continues to grow, the more of a pain it becomes to manage. Object based storage removes your need of worrying about the underlying filesystem and architecture and just use it as a hole to put your data. The first thing i thought of before reading the article was Amazon's S3.
What would be great is if they have or eventually have a QoS algorithm built into their KOSP so that we can mix and match SSD and spindles along with data redundancy and eventually not worry about making as many backups, etc. Through in the ability for snapshots and you have your own little datacenter-like storage platform in your house. Next, add in remote capabilities to store the data at a friend's house or a data facility for off-site protection.
Assuming they can manage the performance in a decent way, this could be a great way to manage storage in your PC.