First question - what is motion in its truest form, when interpreted by human vision?
Well I guess if we're getting REALLY technical about it, i suppose space and time is the 4th dimension, right?
But i guess my question is, will we ever be able to capture motion, rather than images put together to look like motion?
Without a definition of what you're wanting to achieve, I'd suggest it will be a very long time indeed!
I don't know if this is the lines along what you're thinking, but some compression formats already include temporal information, telling the decoder that this "object" has moved by this much since the last frame. The actual image isn't stored, just that movement information. But you're still stuck with frames, because we don't actually know where that object is between the times we measured it's location.