Prediction: the shared office concept will continue and headphone technology will get better.
Also, VR (Virtual Reality, remember that term?) will get better with Oculus Rift and the like. Video will continue to take over as networks get faster. And office chat / productivity tools will get more immersive (like Slack and Google Hangouts).
This will eventually (but soon) all converge into workplaces like an airplane hangars
In this future, everyone is wearing headphones like in a helicopter, and they're miked up and talking into receivers and everything has noise canceling technology. They'll probably have head mounted displays half the time, and if not, just inhabit a cube made out of monitors.
Welcome to your brain in a vat a.k.a. the matrix.