FC fractional bandwidth coming back ?

Fiber Channel fractional bandwidth (Class 4) where single FC connections are broken into multiple Virtual Circuits. As far I know there are no real business use case for fractional bandwidth. But I guess this may change with advent of FCoE, 6/12 Gbps SAS/SATA and Solid State disks. The SSD latency is so low, its capable of delivering thousands of IOPS to FC Initiator. When multiple FC initiator are connected to SSD disks there could be business need to provide fine granular QoS.