The noteboards fold away to almost nothing so they will not take up space. Space is so often the reason why tabletop gamers don’t make more use of minis (money being the other) and they don’t smudge so you shouldn’t transfer inky fingerprints to your character sheets.
I’ve had Noteboards in my “RPG ideas to blog about” list for nearly two years now. In that time the little company has grown well – two websites, for example! Gamers have had the same idea. Here’s a tweet from Robin D Laws that features the DramaSystem character relationships on a Noteboard.