You can’t have it now nor will it provide any relieve for current desktop computers or devices, but in the future USB version 3 will offer transfer speeds up to 4.8Gbps. (Much faster than current USB Version 2 speeds) To give you an idea how much data that will transfer, a 25GB hard drive worth of data could be transferred in about 70 seconds.
Gizmodo has more information HERE.
As with USB 1 and USB 2, devices built with USB 3 will work (although at a slower speed) on older connections, or older devices will work with new desktop computers with a USB 3 port. (Also at the slower speed)