I just copy/pasted the email response. The person that emailed me was in cursomter service, so my guess is they got that information from an engineer.
I don't own the device nor planning to do so, but it sounded strange to me. I've been working with software engineers for more than 10 years and never heard that expression. Perhaps is some language artifact, or I'm just an ignorant, so that's why I was asking for.
Restarting the OS it's equivalent to restarting the computer, it's the only way to do it, but it doesn't makes much sense, as it would do so anyway when turning off the device. I never heard of a firmware update that restarts the OS, a bit strange right? So I guess it's refreshing the config of some process, governed by the OS. Or who knows...
It's not the most clear statement in the world, that's for sure.