I wont say it'll never happen, I'll say its extremely unlikely, for a few reasons i can see.
Devs needed to work on getting w8 working on a tegra2 anything, let alone an a100
W8 itself being modified to run on the a100 specifically, there is next to no dev support for this device for android let alone another os.
Did I mention devs needed to do this stuff?
IMO i wouldn't wait on this, its extremely unrealistic to expect. But I could be wrong, it happens quite often.
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All that remains