The single port uses a brand-spankin'-new technology called USB-C. It is about a third of the size of a standard USB port, giving Apple (AAPL, Tech30) the ability to make the new MacBook its thinnest and lightest Mac ever.

But that simplicity and thinness come with big tradeoffs: For people who want to use their existing, standard USB devices with the laptop, they'll have to buy an $80 adapter.

Apple's gamble (and hope) is that the rest of the PC industry soon follows suit, and USB-C becomes an industry standard.

(money.cnn.com)