Article: A Dao of Web Design
Seems fair that like print, design conventions on the web are a collection of (evolving) notions about how best to convey information to the most people, the measurement tools are a bit different, but why wouldn’t they be? Shedding points for percentages seems like it will be an easier transition than chucking inches for points. Discovering what the pleasing percentages are between body text and the heading, and using 1.5 the em size for the margins will likely become comfortable with time.
Designing for the most common denominator, or worst case scenario in terms of what the viewer might be using to see your creation seems like the safest course.
