Finally, I noticed something cool (or weird to be precise) after looking at the new surface ads so many times. You can attach 4 keyboards at a time .
See 0:24, when the guy on the floor taking blue keyboard and throwing those 4 keyboards away.
Anyway, what I like from the new ads is the click sound . It also implies how easy to attach your keyboard even by running and jumping around. Everyone can use surface, from students to elders.