Turns out there's not much that we didn't already know or could guess.
In his piece VizMedia At C2E2 2016 #C2E22016, Funk confirmed that no add on to the Death Note manga is planned now or in the future. That should answer the regular search terms leading people to this site, asking 'when will there be a new Death Note manga?' or 'is there a sequel to Death Note?' Nope. Sorry.
Mostly it seemed that Viz were in Chicago bigging up the Blu-Ray Death Note Omega Edition, which was recently released. They showed a trailer demonstrating the difference in quality between the old bog standard anime and Blu-Ray. Which is also on their YouTube Channel, so you may see it too, alongside an extended marketing clip unboxing the Death Note Blu-Ray Omega Edition, also by Viz Media.
Death Note Omega Edition Blu-Ray Official Trailer
Unboxing Death Note Complete Series Omega Edition Blu-Ray (Viz Media)
For those tl;dw people: it's the entire Death Note anime in high definition Blu-Ray, all 37 episodes plus both Relights.
The Relight films have commentaries from the makers, explaining what decisions and processes had to be completed to compress the whole story into two shorter movies.
There's also a booklet, which looks like a Death Note, containing the pilot manga one-shot story featuring Taro Kigami. The content is pretty much copied from How to Read, but the cover looks fabulous.
Talking about covers, the box containing the Blu-Ray Death Note anime discs itself has a reversible cover. You can opt for Misa adorning your collection instead of Light and L.
Those are the highlights.
Death Note Omega Edition on Blu-Ray was released on March 1st 2016.
There's more about it in our anime and movie gift section.