design issue

The one design issue that Microsoft hasn't changed with the Surface Pro 4 is its "lapability" problem. When the keyboard is attached, its rear kickstand works well on a tabletop -- but typing on your lap or in a crowded airline seat remains a logistical challenge. Instead, Microsoft has addressed this problem with a whole new sister product, the Surface Book . Billed as the "ultimate laptop," it takes some of the Surface Pro's design cues (detachable screen, impressive keyboard) and folds them into a more traditional notebook-style product with a strong hinge that keeps it from tipping back. The Surface Book is cool, and available in even more powerful configurations -- but it lacks the Pro 4's lighter weight and better portability.