The only scroll wheel behaviour within a table in ArcMap is to scroll through the table's contents, regardless of whether a cell or row is selected or not.
In Pro, if a cell value is selected (in a numeric field) the scroll wheel will scroll through adjacent values in that cell.
For users who are used to ArcMap's behaviours and who are entering lots of information in table view this is dangerous behaviour and a slight unnoticed nudge of the mouse can lead to data errors.
I can see arguments for this functionality, but it would be nice to have an option to switch it off so the scroll wheel will only scroll through the table itself.
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