That describes my workplace. (But with two rather than three monitors.) Standard monitors that operate over HDMI/DVI/etc don't have USB hubs without a separate USB connection, most keyboards are the same way.
> Either you're mobile and need the USB ports, or stationary and there's a hub there. What use case am I missing?
Sure, you can work around the lack of IO by buying a hub, but the point was that previously you would not have needed yet another dongle.