The global smartphone industry has absolutely exploded into one of the most important segments in all of consumer tech today. And, although the competition in this space has never been fiercer, as names like Nokia and Blackberry attempt to regain their long-lost footholds, it's becoming increasingly apparent that the handset space truly belongs to Apple (AAPL 0.53%) and Samsung. Although the first half of 2013 has seen many new and competitive offerings come to market, it's clear that the Apple/Samsung duopoly is as robust as ever. Taking a look at the smartphone industry from the lens of what matters most, profits paint quite the picture.