i am still curious as to whether or not the update would add anything useful.
Usually the mfg will list exactly what the new BIOS provides. I'd look for that, it might be called release notes or changelog or something to that effect. It should provide you with the details of what it does and depending upon that...you can determine whether it's something that you think you actually need.
I looked for that earlier and found nothing. Maybe it's there, where I couldn't find it, but remembering the distant past, when I had a Gateway, they are not good about providing details.