The iPad Mini with Retina Display (left) and iPad Air
A view of an Apple iPad and iPhone displaying the Facebook app's splash screen May 10, 2012 in Washington, DC. Social-networking giant Facebook will go public on the NASDAQ May 18 with its initial public offering, trading under the symbol FB, in an effort to raise $10.6 billion. AFP PHOTO / Brendan SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/GettyImages)
Lee Jae Won / Reuters
An employee holds up a Samsung Electronics' Galaxy Tab tablet computer (L) and an Apple iPad as he poses at a store in Seoul August 27, 2012. Samsung Electronics shares tumbled more than 7 percent on Monday, wiping $12 billion off the South Korean giant's market value, as Apple Inc's sweeping legal victory in their U.S. patent battle raised concerns about its smartphone business - its biggest cash cow. A U.S. jury found Samsung had copied critical features of the hugely popular iPhone and iPad and awarded Apple $1.05 billion in damages in the most closely watched patent trial in years.
Elise Amendola / AP
A student looks at her new iPad at Burlington High School in Burlington, Mass, Aug. 23, 2011. Burlington gave iPads to every one of its 1,000-plus high school students.
The iPad Air (left) and iPad Mini With Retina Display
FILE - In this Tuesday, Feb. 28, 2012 file photo, a man walks past an advertisement of Apple's iPad 2 in Shanghai, China. Apple apologized to Chinese consumers after government media attacked its repair policies for two weeks in a campaign that reeked of economic nationalism. (AP Photo/Eugene Hoshiko, File)
FILE-In this Friday, March 16, 2012, photo, Apple employees welcome hundreds of customers in front of the Apple store at a shopping mall in Oberhausen, western Germany, as the new iPad goes on sale at the Apple store. On Monday, Aug. 20, 2012, Apple set a new record for the most valuable company at $621 billion, beating Microsoft's 1999 high. (AP Photo/Martin Meissner, File)
Mike Segar / Reuters
Apple iPad tablets and iPhones are displayed inside the newest Apple Store in New York City's Grand Central Station on Dec. 7, 2011
Marcio Jose Sanchez / AP
Paul Sakuma / AP
The iPad makes its debut
Aly Song / Reuters
A man checks his iPad on the Bund in front of the financial district in Shanghai September 24, 2013.
Microsoft Word 2013, as seen inside Parallels Access for the iPad
ALY SONG / REUTERS
A man looks at his Apple iPad in front an Apple logo outside an Apple store in downtown Shanghai in this March 16, 2012 file photo.
Osservatore Romano / Handout / Reuters
Pope Benedict XVI uses an iPad at the Vatican, June 28, 2011.
REUTERS / Robert Galbraith
Apple senior vice president of worldwide marketing Philip Schiller introduces the new iPad mini during the Apple event in San Jose, California on October 23.
Marcio Jose Sanchez / AP
The iPad, after it was unveiled at the Moscone Center in San Francisco
Quittner, left, and Pine flanked by iPad (left) and conventional layouts for this week's issue.
Justin Sullivan / Getty
A guest plays with an iPad during an Apple event in San Francisco
Ray Stubblebine, Electronic Arts/ Reuters / Handout
The Scrabble application for the newly released iPad is shown to a customer in New York City