I very much like this infographic from COAR. I've been working with COAR on the Next Generation Repositories Working Group and we have been gradually building a picture of a technological future for repository systems. As this work has progressed over the last year or so, it has gradually become clear that there is an opportunity to describe a sustainable knowledge commons. While the Next Generation Repository group is gradually assembling a picture of the technical components and protocols which can make this work, this infographic covers some other, non-technical aspects which will also be required.
I recommend taking a look at the document from which I have taken this image - it adds some useful context.