Regarding optical problems, maybe it would be less detrimental to the optical scheme if it can be mounted on the front of the lens, as if it was a lens cap (which it is).
That way it would only meet the "parallel" so to speak light rays that enter the lens optical scheme.
If you put it instead where the shutter is in barrel lenses, the LCD glass would be hit by light rays which are not "parallel", they have already been "bent" by the front lens elements and they strike the LCD with an "angle" which is going to create, IMVHO, problems.
Instead of:
Focal plane ---- lens elements ---- shutter --- lens elements --- SUBJECT
one would have:
Focal plane ---- lens --- "magic lens cap" --- SUBJECT
<EDIT>
that would make them available also on any camera which has a filter thread. Imagine a LCD shutter on a Rolleiflex, a Retina etc... provided the own shutter can be stuck on Bulb mode.
</EDIT>
Fabrizio
PS Besides optical problems I wonder about introducing a battery in a setup (large format, barrel lenses) which typically makes without. Not too much of a hassle, if one has the habit of always having fresh batteries with him. I cannot form this habit, it seems.
It all sounds very interesting in any case.
