Fine, there are methods of using such a line speed. But is it realistic? Are you going to continously;download things to your pc? Wht about the cost of these RAID solutions?
Yes it is, and you, a normal user, have absolutely no need for this kinds of speeds, nor can you afford it.
This is a requirement for places where big speed is needed for data transfer.
And think a bit about the future, just a keyboard and mouse and a screen, the rest is on a server miles away all connected with a 5Gb/s internet connection!
I guess you were just trying to show me how non ethical it is for home usage.