Jose writes:

I'll bet it would be more in focus. I don't think lenses are designed
to take the straightness of a screen into account, and we just put up
with blurry edges and a sharper donut.

It would be blurry. In order to project an image sharply onto all points of a
curved screen, you need a special lens, or a special projection source (if the
projected image is also curved in the right way, it will be projected onto a
curved screen correctly, but that would be very unusual--nobody is created
curved primary image sources for projection).

In large simulators multiple lensing systems _in front of the screens_ are
often used to produce collimated projections that appear to reside at
infinity, which is the most realistic way to present the visuals (anything
more than 20 metres or so away is pretty much at infinity for human vision).

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