[gknoy]

    Will I forget holding my first child? 
    Will I have forgotten cuddling up in my mom’s lap? 
    Will I miss having forgotten these things? 
    If I can still remember all those moments ... will I still be human in any sense?

I've already forgotten most of those things, aside from a few fleeting glimpses. I absolutely miss being able to remember details about things like childhood, middle school, the first months of my kids' lives, the smell of their hair etc. But life is still rewarding, my kids and family bring me endless joy _right now_, and I don't feel any less human.

If I were able to live another hundred years, I am sure I'd forget things from my time now, forget even more details about my early life, but would still have plenty of things to keep me interested in continuing to live. There are such an abundance of things I can think of that would be worth spending decades mastering, each of which are less important than my current needs, and which I generally have discarded because "it's too late by now...". Swordfighting, glass blowing, painting, creating music, etc. Imagine being able to find something new and interesting, and being able to devote forty or fifty years to developing a (current) lifetime's level of expertise in it. That sounds like science fiction to me, but if such were possible, I'd pick it every time over not having the opportunity.

    Will I still be human in any sense?

I feel like we would redefine what "human" means to include our new selves. I can't imagine not feeling human, even if it is Very Far from my current conceptualization of humanity.