Microsoft

After three generations of pitching "a tablet that can replace your laptop" -- with mixed success -- the formula has finally clicked. The 2015 version of Microsoft's tablet adds the latest Intel processors, a slightly larger screen (perfectly sized at 12.3 inches with a just-right 3:2 aspect ratio), and a handful of hardware and software tweaks, but doesn't radically change the DNA of its predecessor, 2014's excellent Surface Pro 3 . That's a wise move, because at this point, the Surface Pro line is less about pitching the very concept of the tablet PC with a detachable keyboard to wary shoppers, and more about seeing how far it can go in refining the finished product.