Netgear is showing off a number of routers at CES this year, including one model for use as a cable modem replacement. The Nighthawk X4S AC2600 Smart Wi-Fi Router is being touted as a networking appliance for gamers and those who value connection speeds, while the AC1600 Wi-Fi Cable Modem Router is a high-performance router with a built-in CableLabs-certified DOCSIS 3.0 cable modem, allowing it to support cable Internet speeds of up to 640Mbps.