Based on my article in IBM Smarter Planet blog: http://asmarterplanet.com/mobile-enterprise/blog/2013/11/mobile-sense-knowing-customer-hit-app-store.html
What I can learn from the article is about aesthetics in design. In my opinion, we can apply many principles and techniques from HCI. In addition, recently there has been much work done in the area of color psychology which is very useful for target segments of population.