We'd rather ship less and have this page stay honest than list everything we're thinking about.
Vertical and square export — landed in v3.0. One recording, re-composed for every platform: 9:16, 4:5 and 1:1 alongside the original 16:9. Because AutoCast keeps your screen, camera and captions as separate layers, it re-composes the frame instead of cropping it. See thechangelog for the full v3.0 list.
Nothing is committed publicly right now. When the next release takes shape, it'll show up here first — we'd rather this page be short and true than long and aspirational.
Have a feature request? Tell us — this list grows from what people actually ask for.