We've just elected a new president. Barack Obama starts a four-year term starting January 20. There's no way to know how America and the world will change during this time. But we can see how mobile technology will change.

Think of what has happened in mobile technology during the last administration. When George W. Bush was re-elected four years ago, the world had never seen the iPhone, the netbook, 3G, Blu-Ray, the Amazon Kindle or Twitter. Back then, Facebook was for college students, Treo was the best smart phone (and couldn't run on Windows Mobile).

Of course, the president has little to do with all this innovation. Still, it's a meaningful way to mark time and take stock of how our culture is being changed by the most personal of personal technologies.

Because the rate of technological innovation always accelerates, we can expect gadget transformations during the next four years to advance even further than during the last. Here's what you can look forward to during Obama's first term.

Everything gets smaller, and everything smaller gets better. Laptops have already surpassed desktops in sales. Within four years, desktop sales will slow to a crawl while mobile computing sales will soar. Netbooks will go totally mainstream and offer an experience that approximates current high-end, full-size laptops. People will use netbooks like laptops and mobile phones like netbooks. Mobile phones will both capture and display high-definition video.

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