One such came in today. It's the Satechi Multifunction Mini Router. The main things of interest are -- 1) If you travel, you can seemingly set up a wireless connection easily, like if you're in a hotel and don't want to be tethered to the room's Ethernet cable, 2) If you have a a weak WiFi connection in part of your house, this will boost the signal, and 3) It can of course be your main router.
Satechi generally makes respectable products, though I haven't come across anything from them in this area. Mainly, speakers, chargers, transmitters and peripherals like that. But if this intrigues you, here's a pretty-detailed YouTube video demonstrating how it works.