Along with the gossip will launch new Macbook series you'll also hear the term a new connection that is Thunderbolt.
Actually this is not new technology but if you remember with the Intel Light Thunderbolt Peak is the same technology but Apple uses the word as a replacement Light Thunderbolt Peak.
Thunderbolt which is the latest connection allows us to transfer data until the minimum speed of 10 Gbps or 2.1 x faster than USB 3.0 or 20x faster than USB 2.0 or 12x faster than FireWire 800.
Although the Light Peak itself using Fiber cable but Thunderbolt is still using copper wires, but still promises to speed the transfer could eventually reach 100 Gbps.
Another advantage with this is the Thunderbolt connection can be connected to several other types of connections such as PCI Express, DisplayPort, USB 3.0, SATA and the other but it does require certain changes.