Low latency (real-time) can be an important part of effective and engaging communication.
Sure, it's not for everything; I wouldn't want my email communicating word by word to my recipients as I typed.
However, enterprises usually involve a lot of communication - with team members, stakeholders, and clients. - there are many opportunities to spice things up and make them more engaging & effective.
There's also the opportunity to instantly communicate non-prose - manipulating datasets, images, graphs and charts in real time.