I've been waiting for 2 years for Duet to support two iPad displays. Had two iPad 2's just waiting to be converted to external screens for this purpose...was in contact with the developer for a good while lobbying for it, but it seems like it is too much.
That would have been an excellent portable solution for a two external display setup, USB-C dongle out to two iPad external screens with an extra USB-A and power - would have all fit in my briefcase as well!!
But now I am looking at my actual home office as I automate processes and hopefully don't have to be running out to clients in different nearby cities as much as I have been.
Looking at setting up a dual 21" monitor workstation with Apple's new Magic keyboard and trackpad. Also hiring a new employee who I want to offer the same setup, but they will have an MBA for their laptop. I already have a solution for dual external displays there.
There are several really promising solutions out there, stationary docks that promise up to 3 external displays from the rMB, using the display port alternate mode for HDMI 1.3 1 for of them up to 4k and then up to 1080p @ 60Hz for the other 2 using onboard DisplayLink graphics processors for HDMI and DVI outs on the dock.
This one
here has apparently been
reviewed already and can do 1 4K and one 1440p, or 1 4k and 2 1080p - pretty good! But...doesn't ship until sometime this summer maybe? Don't really need the setup until August, so can wait a bit, but it seems like we have been perpetually in this "almost there" phase of this technology!
Dell also has a couple of mini USB-C docks out with
VGA and HDMI, but those are being reported by rMB users out there as not being compatible with the rMB.