At the CES (consumer electronics show) event in Las Vegas, the new standard for USB has been presented: the 3.0, also called Super Speed USB. The differences with current 2.0 high speed USB is of course higher speed thanks to 5 lines/wires communication instead of 4 ones (it should be around 10 times USB 2!) and a lower power consumption.
We will sure see it soon in cameras, already 17 devices (mainly portable drives and high end portable PCs) seem to be USB 3 certified.