Apps are a part of our lives, a very recent innovation, and they are not going away any time soon.
The commercial challenge is how to monetarise them, make a return, build a business. We have learnt since the tech bubble a decade ago that if you build it, no matter how virtual, the rules of commerce still apply, you need to add real customer value before anyone will fork out their hard-earned on it.
Some of the best minds around are experimenting with ways to turn an buck from Apps, some like Amazon, Zappos, Apple, Groupon, and a few others have been sensationally successful, but for every success, there has been perhaps thousands of failures.
It is relatively easy these days to get someone to “like” your post, or site, getting them to “buy” from it is much, much harder.