I think you're focusing to much on my usage of the word "shift". My concerns are entirely grounded in our mutual agreement that neither linux or Android is in a position to take the desktop market from Microsoft. If it was, we could rely on having a fair share of non-secureboot ARM workstations at our disposal.
My point is that this time around, we won't have a chance to even try before Microsoft completely locks desktop linux out of ARM with secureboot, and Android finds itself the only contender to push back into that space, a space that I worry it will never be targeted toward. This leaves the future of linux being overwrites on toy gadgets designed to running Android, which would be a sad state of affairs.