Would be cool to have the field description show up in a contextual help tooltip on the frontend when hovering over a help or '?' icon.
could even use the exact html and css as you already have in the form editor in admin, that displays the little help tooltips when you hover over the questionmark icons.
Maybe have a setting at the form level, whereby you can check a checkbox and all field descriptions become help tooltips with '?' icons next to the input boxes?