Here's a photo I took on my iPhone of my Surface Pro 4 hooked up to a second monitor, external hard drive, keyboard, mouse, midi controller, mini mixing console, and my Apple Watch charging on the extra USB charger included on the plug. Oh, and also the pen is safely docked on the side of the device... Because Microsoft thought it would be wise to give you multiple solutions for storing the pen. Also not shown, the 128GB microSD card inside the device to supplement the 256GB model I own.
If, by years ahead, you mean that the iPad does not yet have the software or expensive accessories to support these types of setups, yes, you are right.
As I've said before, I am also an Apple fan and do believe that we will one day see lightning accessories of all kinds, but the markup will be insane (as manufacturers know that we will pay it) and they will roll out right as Apple switches to USB-C.
The surface pro 4 is really cool, Im so relieved that they finally updated the type cover keys and trackpad. For me it is so much better and rivals the quality and feel of most ultrabook keyboards.