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 Perplexed.

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 Big Smile. It also implies how easy to attach your keyboard even by running and jumping around. Everyone can use surface, from students to elders.