The new Xbox One S has been officially announced. It's not just smaller, it's a HDR powerhouse. 40% smaller. Up to 2TB. Built-in power supply. IR blaster. New controller. 4K Ultra HD video support. (UHD Blu-ray drive included as well).
The new controller uses both Bluetooth and an improved Xbox frequency. Thus, one controller can be used with a PC (via Bluetooth) and with a Xbox One.