
Thunderbolt’s wires are the first to combine the languages that handle data and display in one channel, making it faster and more versatile than any other connection. Because Thunderbolt sends data in two directions at 10 gigabits per second, users could copy a one-terabyte hard drive in three hours while still piping a movie to a monitor. And because it can talk to any device, users can link a series of peripherals—think a monitor, printer and hard drive—to a single USB-sized plug. Thunderbolt ports are already on all Apple laptops, and peripherals are expected from Canon and other companies.
Apple users still having problems with this technology, it's too much for them. (Check their forums...lol)