Intel has been working on a super-fast connector technology that it is calling Light Peak. The initial versions will use copper, but they will later move on to fiber-optics. It was touted by Intel as a technology that will replace all kinds of various connectors required to connect peripherals to a computer.
Put the two facts above together. What do you get now?
Apple may use a name other than Light Peak when it is implemented on a MacBook... or another device (it isn't confirmed).
Light Peak is said to carry data at about 10 gigabits per second in both directions, using fiber-optics, which is significantly faster than the gradually-coming USB 3.0, which goes upto about 600 MB/s.
What do you think about this? Tell me in the comments.