rMBP etc connected to retina iMac?

[Sonmi451]

I wonder if it will work with another device connected if the iMac display is in slave mode or whatever you call it.

I think i'm gonna hold off on the iMac, but if they release a retina Cinema Display, I'll get one to use with a Macbook Pro.

 

[shokunin]

According to anandtech, it does not support Target display mode. You won't be able to display 5k from a thunderbolt connection to the imac from your MBPr.