Switched On: Tablets and tradeoffs

This week saw the debut of two ARM-powered tablets by old rivals. One eschews traditional desktop input methods; the other embraces them. One occupies the high end of pricing in its class; the other is competitive with the market leader. One had the engineering goal of fitting in one hand; the other comes with a kickstand for being set on a desk or table. But perhaps the biggest contrast between the iPad mini and the Surface RT approaches is how well they take advantage of the hardware and softw...