This week Readability, developed by the New York design and technology firm Arc90, took a big step forward in addressing the queasy little problem that underlies all three products: Some of that visual detritus is ads, and they pay the bills for the people who originate and host the content.
Next time you step foot in a luxury hotel, take a minute to consider the many ways your senses are stimulated by the design, lighting, music, and, nowadays, scent.