I find USB ports in plane seats very convenient. You're anyway stuck in your seat and chances are good that you're low on juice during a day of traveling. Sam

I find USB ports in plane seats very convenient. You're anyway stuck in your seat and chances are good that you're low on juice during a day of traveling. Same goes for trains. Alas, they usually have power outlets. Given that my boarding passes, train tickets and other vital information is on my phone having power is essential. As a light traveller I don't want to schlepp an additional gadget. To each his own, I suppose.