My favorite was the Dell Venue Pro 8 that doesn't come with Windows 8 Pro - we had to side load it, which took a bit of effort to figure out. If that one had the ability to dock, it would be a great device; but Dell wants you to pay $800+ for a 10-inch tablet in order to dock it, and we can get a laptop with twice the computing power for that.
That being said, Windows Industry and some of the rugged handheld designs coming out might be a pretty sweet solution for retail, finally replacing the ancient Motorola 9090 scan guns running WinMo.
As far as Windows tablets go, the most impressive one I've seen yet is a tech demonstrator from Intel that has a 64-bit quad-core Bay Trail in it. It's a hell of a device, but definitely not a finished product - it has a hole in the plastics on the back exposing a diagnostic port.