The blog post talks about the iPad Pro, not the Surface.
On an iPad Pro, the Smart Keyboard is very short because it doesn't have the function keys; this allows your fingers to reach the screen for Control Center or for the new keyboard toolbar (autocorrect word choices, bold/italic/underline, font, etc.). Very handy!
I know, I read it. Odd choice of devices for your argument.
In other words, why are the Surface products any different to the Macbook?
Also, what use are function keys for iOS?!