Pulse is a manifestation of time. It is the material from which we organize the passage of time. Musically, it gives us something to hang sonance on. The axis formed by pulse and sonance provides us with the material to create listening objects by implementing delta.
Prior to the advent of electricity pulse was limited to the concept of rhythm. However we are now able to reach into sound itself, and it follows that we should further develop the organization of time on that level as well.