Your mobile phone has every other function except calling people? Everything becomes more complicated, especially technical devices for your every day usage?

On November 10, 2011 is the World Usabilty Day. This worldwide theme day considers usability of products in general. Worldwide events present the simplicity of products, their design, and usage. Darmstadt is one location for this. Topics are the interaction between human and technology: How do products function? What is so difficult about it? Which devices can be improved?