There had been some discussion on this list about using Raspberry PIs for DCP making and checking. 

Now, I just found a PI 3B sitting piggyback on the new GDC SR-1000 IMB:

Raspberry PI 3B:

https://cdn-reichelt.de/bilder/web/xxl_ws/A300/RASP_03_01.png

GDC new SR-1000 IMB (IMS):

http://www.gdc-tech.com/ndownload/product/SR1000/SR1000_front.jpg

They just removed the USB sockets. But it sure is a Raspberry PI 3B. It is probably the PI that earns this MB the 'standalone‘. 
No, the PI will not do the heavy (J2K) lifting et al., the MediaBlock itself is below the huge heat sink on the right side of the IMB. The PI will probably just do communications, webinterface/GUI.

- Carsten