USB 3.0 is apparently going to be ten times faster than USB 2.0 .The USB 3.0 works at a super speed exchanging data of speed up to 4.8 Gbps truly much greater when compared to USB 2.0. Another advantage is its ability to receive and send data at the same time, which was not present in the previous versions. One doesn’t have to worry if your device doesn’t support USB 3.0 as it’s sure to work on it at the lower, but supported speed.
The new version of USB connectors gives many options for adaptation. A speed of up to 4.8 Gbps is sufficient for HD video as well as audio signal broadcast working efficiently unlike USB 2.0 version where in the speed is limited to external devices like the portable HDDs or external optical drives. The cable seems to be a little thick, which might be reasonable for such a huge increase in speed.

Via: GadgetsReviews