Much like the RF board on the Xbox One, the front panel board of the Xbox One S detaches outward from the lower case.

With the front panel board's EMI shield removed, we quickly spy a lone IC and some of its friends:

MediaTek MT7632TUN (Likely a variation of MT7632 2x2 802.11n + Bluetooth 4.0 Module)

Skyworks SKY13314-374LF GaAs SPDT Switch

Sync switch for wireless controllers

IR Blaster

Power Switch

Eject switch