We also got accepted into Neural Engineering 2019 coming up in March - https://neuro.embs.org/2019/

Exciting stuff from IEEE Brain symposium for advanced neuro-technologies included: 

1.) neurograin: much smaller and more sophisticated than neural dust. I saw some, it's a grain of sand sized chip that sits on the cortex powered through induction. 
https://www.brown.edu/…/resear…/research-projects/neurograin
2.) acoustically steered optics. Creates acoustic diffraction gratings to control the path of light. 
"Ultrasonic sculpting of virtual, steerable optical waveguides in tissue" (in press) - https://taflab.berkeley.edu/publications/
3.) Soon to be in press, measuring near-infrared light reflected during local field potential activity. No optogenetics, just a simple straight forward correlation between light and electrical activity at the cortex.