In a nutshell, here is what it promises:
- Higher transfer rates (up to 4.8 Gbps)
- Increased maximum bus power and increased device current draw to better accommodate power-hungry devices
- New power management features
- Full-duplex data transfers and support for new transfer types
- New connectors and cables for higher speed data transfer...although they are backwards compatible with USB 2.0 devices and computers (more on this later)
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Today's products what uses these technology.
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What I really like about this new standard is its backward compatibility. USB standard is a well planned technology that its next generation has been included on its first design. Devices drivers may also be backward compatible. :)