We've just posted a very rough beta which includes a prototype of this feature. This is not a promise that we'll release the feature, but we are hopeful.
We are prototyping a third-party library to render the PDF contents so you'll see a watermark on embedded PDF maps, but don't worry about that. What matters is that they're accurate and they render ok. The button to display a georeferenced PDF is the big gray blob to the right of the Plates window listing for the document. We'll improve the graphics for it if/when we release the feature, obviously.
Feedback wanted!

Worked first time for me on Nexus 7. Brilliant this is the Android feature i've been waiting for the most!

I like the fading out of inactive sectors (for multi-sector routes) - it's much better than just the blue outline for the active sector which in my opinion is no longer necessary as it's hardly visible anyway and drawing it probably uses up valuable resources.

Unexpected behaviour: Double-tapping anywhere on a displayed plate re-centres on the centre of the plate not on the point tapped.

Will keep playing....