(CNN) -- 2013 will be a year of harsh change for the tech industry. We've just experienced five years of rapid, messy and disruptive innovation, and smartphones and tablets aren't the future any longer -- they're the present. Powerful mobile devices connected to broadband-speed cell networks are now an everyday reality, and it's going to take more than a bigger screen or faster processor to make an impact this year. Think of 2013 as the year of refinement and reckoning. Here are five big developments to keep an eye on: 1. The future of Microsoft Microsoft has been very candid about "missing a generation" of mobile innovation after Apple introduced the iPhone, and 2012 was all about the results of a furious catch-up effort: the company launched the completely rethought Windows 8 for PCs, Windows RT for tablets and Windows Phone 8 for smartphones. CEO Steve Ballmer also repositioned Microsoft as a "devices and services" company, and he introduced the Surface and Surface Pro, two tablets designed by Microsoft itself to compete with traditional PC companies such as Dell and Sony.
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Nilay Patel: 2013 is the year of refinement and reckoning in the tech industry
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Patel: There are five big developments to keep an eye on
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He asks whether Apple will get its mojo back and what will Microsoft do?
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Patel: Can Facebook grow up, and will Amazon be able to compete with Google?
That's no easy task: @placeholder figured out how to make money selling ads on its website just as most of its users switched to smartphone and tablet apps.
That's in stark contrast to the @placeholder experience, which is pristine and controlled by Apple from the start.