Thunderbolt (and I assume those ports are actually Thunderbolt 2) are THE fastest method of connecting external devices thus far available on consumer machines. They can handle video (compatible with miniDisplayPort), audio, and data. Currently, a lot of the stuff you might attach to them for native Thunderbolt speeds is kind of expensive (not as much as it once was, though!), but with adapters Thunderbolt ports can be nearly any kind of port ever: USB 3.0, FireWire, Ethernet, VGA/DVI/HDMI and many more.