16. iPhone Drawing by David Hockney, 2009

The touchscreen interface of Apple's iPhone was fascinating upon its debut in 2007 and was full of untapped potential. While some were ecstatic about organizing voicemails and music, artist David Hockney chose to indulge the technology in a much more fanciful way. His series of iPhone drawings in 2009 carry the same sort of painterly quality of his prior works, and show that Mr. Hockney is continually apt at producing work that is both pertinent and enjoyable.

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