The travel router is an interesting device, and no doubt a lot of people are fine with bringing along a 1/2 pound device and setting up a personal WiFi network on a commercial airliner. I am not one of those people, and have a bit of difficulty seeing this lashup as a great replacement for a tiny memory card that lives inside my phone or tablet. A 128 GB micro SD holds more music and video than I can possibly listen to and watch on a round trip between Los Angeles and London. And while in-seat USB ports or AC power receptacles aren't ubiquitous, they're becoming more common. I didn't have to take my battery out of my carry-on on my last trip (12 hours in the air each way) to keep my devices charged.