Transparent Post-Its

It's sad to say, but I got really excited about this... The creators of the ubiquitous Post-it Note have improved this disposable yet indispensable piece of office stationery by introducing transparency. Sheer Colors, as 3M's calling them, are a boon for anyone who has ever used Post-its as a book placeholder. They're also good for anal bibliophiles who don't care to mark pages with notes or highlighting. Thanks to CoolHunting for the info. Why are designers stationary fans? (I mean 'Stationary' - writing paper and other supplies, not 'Stationary' as in standing still. But saying that, I also like standing still?)