Actually the worst/best thing about Numbers is the way keyboarding on screen is handled (worst in that it's still the worst, best in that they've clearly thought about it and worked hard to make it less bad than it might have been).
I think a spreadsheet app that really figures out a solid way of working around the lack of a hardware keyboard might do well (e.g. allowing you to format cells as sliders or spinners or whatever so you don't need to key in values).
I think a spreadsheet app that really figures out a solid way of working around the lack of a hardware keyboard might do well (e.g. allowing you to format cells as sliders or spinners or whatever so you don't need to key in values).