At an easy angle? Whats that even mean? As far as the keyboard/cover thing goes..it’s designed with the surface and not secondary to it. In fact you won’t need a dongle or anything because the magnetic clip part is also a data and power port..Apple does not have that..and the keyboard attachments I have seen for the iPad aren’t really that impressive.
It means a slight angle. Flat down on a table top may be uncomfortable for viewing in portrait mode. The Surface, with the kickstand out, would sit at an uncomfortable 90 degrees in portrait mode. With the removable magnetic catch iPad 2 cover, you simply detach it from the iPad, rotate the iPad to portrait position and set it on the detached triangular iPad cover. It sits at perhaps 15 to 20 degrees angle off a table top. Makes for easy operating. I have both docking, and bluetooth keyboards, rarely use them as I find the touchscreen keyboard sufficient for 95 percent of activity. So okay, the Microsoft keyboard has a connection port. Bluetooth suffices for me most of the time, and is convenient for wireless keyboarding.
Incidentally, a shortcoming of the Surface keyboard cover is that it only works in landscape mode. There are times when one wishes to type while in portrait mode. If you don't know what that is, it is where the short side of the Surface is down and the long sides are left and right of the viewing area. This is where a wireless keyboard comes in handy, as it can be used in either orientation.