The following sources were cited in SAP Digital Futures Issue 15 Computing After Silicon

Graphene circuits will shrink to 5 nanometers — 2,000 times smaller than a human hair.
Cade Metz, “IBM’s New Carbon Nanotubes Could Move Chips Beyond Silicon,” WIRED, October 1, 2015, http://www.wired.com/2015/10/ibm-gives-moores-law-new-hope-carbon-nanotube-transistors/

Quantum computers will be exponentially faster than those we now use.
“Watch: Quantum Computing Explained in Less Than 2 Minutes,” Science Alert, October 18, 2015, http://www.sciencealert.com/watch-quantum-computing-explained-in-less-than-2-minutes

Swedish scientists have built a computer from nanoscopic protein particles.
Using nanotechnology to create parallel computers,” Lund University News and Press Releases. February 2, 2016, http://www.lunduniversity.lu.se/article/using-nanotechnology-to-create-parallel-computers

A teaspoon of synthetic DNA could store all the data in the world.
Jacob Aron,Glassed-in DNA makes the ultimate time capsule,” New Scientist, February 11, 2015, https://www.newscientist.com/article/mg22530084-300-glassed-in-dna-makes-the-ultimate-time-capsule/#.VONYR1PF_Md 

Passive Wi-Fi uses 10,000 times less power than 802.11a/b/g/n
Mark Harris, “Power from the Air”, 10 Breakthrough Technologies 2016, MIT Technology Review, accessed June 22, 2016, https://www.technologyreview.com/s/600773/power-from-the-air/