Simple things like selecting the text of an input when you tab to it so you can replace it without using the backspace key.
Or allowing setting the focus to a specific input based on a formula - even just setting the focus to the first input when the page opens would be great. As it is you can tab to the first input, but if it is a date field it either misses it or you have to hit enter to get it to come up.
For data entry the keyboard is king!