It's been years since I studied it so I may need to brush up my knowledge to explain it properly.

One thing to note is that there are different interpretations of QM, so one might agree with the interpretation of flipping bits, while another might argue that the object is moving through infinitely-divisible space, on a smaller scale than it is possible to observe, and the bits are just the limits of what is measurable. For practical purposes, either works and it's more of a philosophical question of whether we can extend scientific principles to things and scales where it's impossible to test or observe.

I definitely recall something about using two-dimensional pixels rather than three-dimensional voxels in this context, even though it seems extremely counter-intuitive. It has something to do with surface areas but I definitely can't explain it on my lunch break lol.