In its first 10 years, the iPhone reached 1.2 billion units sold. The iPod managed 300 million units (for comparison, Sony had sold 50 million Walkmans in the first 10 years). Theserevolutionized the smartphone and portable music industry, respectively. This year the iPad turns 10 and while it has sold over 400 million units, the new era of computing it promised never arrived. When Steve Jobs unveiled the original iPad back in 2010, many wrote it off as just a "large iPhone". But Jobs was adamant that this is neither an iPhone nor a keyboard-less MacBook, it occupied a segment that is...