There may be a lot of iPhone covers, Kindle cases and other accessories out now, but if a report by Cisco is accurate, there will be a whole lot more out there by 2016. The company is predicting an 18-fold growth over the next year to reach an annual rate of 130 exabytes.

“By 2016, 60 percent of mobile users – 3 billion people worldwide – will belong to the 'Gigabyte Club,' each generating more than 1GB of mobile data traffic per month," Suraj Shetty, Cisco's vice president of product and solutions marketing, wrote in the report. "By contrast, in 2011, only one-half percent of mobile users qualified."

To show how much this would be, the company said this traffic would be the equivalent of streaming 33 billion DVDs or 4.3 quadrillion MP3 files. The number of connected mobile devices at this point would be about 10 billion, which means there would be more than one for each of the 7.3 billion people on the planet, Cisco said.

With this large amount of data and phones predicted to be out in 2016, expect to see a lot more iPad 2 accessories and other gadgets coming available in the next few years to appease a thirsty market.