Here’s some of the highlights:
- USB 2.0 is 480mbps; USB 3.0 is 3.2/4.8gbps (practical/max)
- Duplex communication – can send/recieve at the same time, unlike 2.0
- Power ouput will go from 500 milliamp to 900 milliamp, which will allow for more devices and more power-hungry devices
- It’s backwards compatible with USB 2.0 devices/cables. Although you need a USB 3.0 cable to actually get 3.0 features.
- You will be able to buy adapter cards for $30-$50 to support USB 3.0
- Windows 7 doesn’t natively support it now, but promises too
- Cards and devices will start to become available in early 2010