If you currently have an online store, then you might want to take a look at this article.  Research company Forrester is prediction that mobile payments will skyrocket between now and 2017.  2012 seen $12.8 Billion dollars in mobile payments.  Predictions are that by 2017 that number could reach $90 Billion.  After reading this, now might be the time to get yourself a mobile app for your store.

Full article
http://techcrunch.com/2013/01/16/forrester-u-s-mobile-payments-market-predicted-to-reach-90b-by-2017-up-from-12-8b-in-2012/