1st, would that new life be sentient & intelligent?
YES
If so, why would it need humans to bow out?
World not big enough for the two of us???
Their god (ie the QC who created them) tells them "get rid of puny human minions"
QC "We (QM and upgraded humans) are not giving you a choice"Of course, the vast majority of humans would not want to.
Would the AIs need/want humans to bow out?
Can only shrug and say who can read the mind (if it qualifies as a mind) of QC (or as human MK2 call QC god)
I predict while we will be able to observe QC (and alter ego god) better than the invisible one in the sky we will whisper to each other " Is QC moving in mysterious ways?"
I doubt that we can replicate anything like it in the near future.
With the computing power of QC it will be able to sequence DNA - throw out the junk bits - re jig the sequence - BINGO Human Mk 2. No need millions of years evolution
Moreover, your examples all require energy, and energy conservation is a prime directive.
? Human Mk 2 would still eat