I'll be more impressed when they will give us 4TB formatted space rather than calling it a 4TB disk drive and having it be far less than they advertise. I'd love to see the industry own up to their deceit of consumers. If a car manufacturer claimed that a car got 45 miles per gallon and the actual driver couldn't get better than 30, there'd be a class action lawsuit on their hands. We just bend over and take it from the companies.
Perhaps they could make it even more fun and call it a 5TB drive. Why not a 6TB? If they can lie about the current disks being nowhere near what they label them as, you know it's only going to get worse. I could care less about their theories about size. I think it ought to be labeled ACTUAL USABLE SPACE AVAILABLE.