"And he looked upon his kingdom and wept; for there were no more worlds to conquer".
So. Many. Pixels. SO MANY. SO MANY PIXELS.
(2880x1800 15" MacBook Pro + 3140x2160 Dell 27", + 3140x2160 Dell 27")
Still awaiting a stand for the 15", and I still need to figure out something along the lines of a thunderbolt dock to reduce that from four connections (Display, Display, USB, Charge) to, hopefully, 1.
However, with this current setup; when plugged in, I am connected to that mouse and keyboard; and have access to twelve USB 3.0 Type A ports. The hub off to the right (I haven't figured out quite where to put it) and the USB ports built into the displays. By swapping one port and changing the input on the displays, I move right on over to the Windows PC.
Also just one dongle (USB-C to USB-A). Both displays are connected with a USB-C to DisplayPort cable.