Microsoft this week announced that upcoming previews of Windows 10 would include new features designed to boost productivity on a personal computer.

Dubbed "Timeline" and "Sets," the former previously trumpeted months ago, the latter a revelation, the pair will, promised Microsoft's top Windows executive, "help make the most of time, one of our most precious resources."

Sets was the more interesting of the two, and not only because it is brand new. Instead, it was Sets' potential that struck a nerve. PCWorld's Mark Hachman, one of the handful of reporters and bloggers briefed before the announcement, said that Microsoft, "plans to overhaul Windows 10" with a single-frame-with-multiple-tabs interface that resembles one of today's browsers.

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