Are QR codes and AR a big deal? It depends who you ask.

MediaPost Publications
40% of "iUsers" Accessing Internet From Mobile More Than From Computer 07/10/2009:
"According to AdMob, there are many similarities between iPhone and iPod touch users in the US, especially in the demographic makeup of each group in areas such as age and household income. iPhone users are generally older. 69% of iPod touch users are between 13-24 years of age, while this same age segment represents just 26% of iPhone users. 31% of iPhone users are 35-49 years old, while only 12% of iPod touch users fall in this age segment. In total, 74% of iPhone users are over the age of 25, compared to 31% of iPod touch users."