I am very curious about this also. There are many factors to take into consideration though.. I think the deciding factor is how well each ship will handle and maneuver, compared to the other, and not necessarily shield strength. Technically a python has a similar handling rating as a FDL, but the FDL, in the right hands, can outmaneuver a python quite easily... So if the FAS can outmaneuver the FDL (which I am really skeptical about) it would make the FDL's shield superiority null and void.
{On Paper}
The FAS out pitches and Rolls a FDL by a significant margin, it's lateral thruster's are not as good however and inparticular they have an awful spool up time so changing direction can be a pain. However this is somewhat balanced by the fact it has the best Pitch speed of ANY ship in the game when at very low or very high speeds (i.e a long way from the blue zone). Like the FDropS it does very nicely when drifted and turning. (figures are available in my sig, note they are not for full optimised ships, which will be ~116% faster, but FAS and FDL are both easy to get to 50% optimum mass).
Oh and apparently the FAS can boost more often than the FDL so it is slight "faster" in a straight line.
[I also have to admit I have only flown a FDL in my testing so it may have some super secret way to make it turn quicker that I am not aware of]
Shields are pants but you can stock up on SCBs and have the power to use them, it really benefits from prismatic shields as it's current class 5 is too small for it's hull mass. If Frontier change it so Hull tank is viable (i.e reduce Pulse laser module sniping) it will be a beast but in the current Meta I'd expect to see shields down, module failure, insurance.
To answer the OP question I don't see it as making either of the Clipper or FDS obsolete, ignoring the multirole aspect of the clipper as I suspect this is a combat question:
FAS vs Clipper. Better turning, better hardpoint placement, smaller profile vs lower shields and lower SCB stacking potential. The clipper retains it's key aspect, that it is faster than anything and for players which value that I don't see it being replaced.
FAS vs FDL. I think will come down to personal preference as the ships seem to have their own trade offs between each other.
In terms of Wings I don't see the it replacing the Clipper that most wings seem to have at least one of, It'll probably become another alternative addition like the FDL is now.
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