My laptop is connected to the power via magsafe and the monitors with HDMI and USB. Keyboard/mouse/webcam/microphone are connected to the monitors.
With the new USB-C plug I guess I'll be able to buy the hypothetical Antec "Super USB Charging Media Hub", which all my devices connect to. My laptop then only needs to plug into one thing.
I would really like PC manufacturers to standardize on this; it would make using laptops as nice as using non-Apple telephones/tablets/ereaders is now.
The decision to not include a single USB port is of course mind-boggling, especially given Apple's market. How are you supposed to share large files? No USB drives, no memory cards etc on the go.