Some sad data from Giga Om on what app developers are making.
More than 50% earn less than $500 per month and about 80% earn less than $2000 per month. Apparently advertising-based apps do even worse, where 1/3 make less than $100 per month. The split isn’t totally unexpected but $20,000 per month in revenues isn’t really that much. That probably pays 2 or 3 people market wages in this industry.
I couldn’t find a number readily but I’d estimate there have been somewhere north of 400 million smartphones and tablets sold in the past five years. Through 1986 there were about 40 million personal computers sold. By December 31, 1986, Apple Computers, Microsoft, Adobe and Oracle, all of whom built themselves specifically in the PC era, were all public. It doesn’t strike me that there are any mobile-specific companies, with 10 times the devices sold, in the same position today.