Each week Ross Rubin contributes Switched On, a column about consumer technology.
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Based on last quarter's global PC shipment numbers, Microsoft continues to feel pain in making the case for Windows is a viable tablet operating system. Theoretically, the dual-identity (Windows 8/RT) operating system has everything it needs to be a contender, but the promise is ahead of the reality on three interdependent fronts: chip-level hardware, legacy support, and app software.
For example, if x86 chips were more competitive with ARM processors from a performance-per-watt perspective, then Microsoft wouldn't be as reliant on Metro-style apps for functionality. And if more developers were creating Metro-style apps, then consumers wouldn't have to go to the legacy desktop mode as much to get things done. (Until the company releases a Metro-style Office, Microsoft really can't wag its finger too much at third parties.)