Digital "demos: MPAA chief presses key showbiz issues as tech lobby courts DNC.

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CHARLOTTE, N.C.

Attending his first conventions as MPAA chairman this summer, Chris Dodd has a markedly different perspective from four years ago, when he was still a senator and a 2008 presidential contender.

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Although he has a high-profile seat at the DNC, having joined Vice President Joe Biden in his suite at the Time Warner Cable Arena to watch First Lady Obama speak to the delegates Tuesday evening, he planned to spend just 24 hours at the confab.

And his appearance reflects the different approaches to these gatherings by the tech industry--Google has a giant pavilion made of shipping containers, and Facebook and Twitter have a heavy presence--and the film biz.

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