- Participants explored a compact optical deflection system that would lock every LCD pixel onto the same retinal location during eye rotation, ruling out galvanometer mirrors and HDD voice-coil actuators as too bulky and high-inertia for a wide field-of-view.  
- A microscope-eyepiece + fast-mirror design was proposed to translate eye rotation into a small angular deflection near the pupil plane, leveraging optical reciprocity to relax mechanical constraints.  
- The channel clarified the term “virtual retinal display (VRD)” to cover both scanning-laser MEMS systems and DLP/laser projectors aimed into the eye, with the key distinction being whether an optical element blocks the natural line of sight.  
- To avoid ambiguous “input/output” language in BCI work, the group coined “impression stimulator” (computer → brain) and “expression sensor” (brain → computer) as concise, unidirectional labels.  
- RETISSA Display II, a 720 p commercial VRD from QD Laser priced at ~US$3 k, was cited as the first shipping example of true retinal-projection hardware.  
- fltrz ordered audio codec chips to prototype an auditory-pathway BCI; fallback plans include EEG, a 2000-pixel “audiorate” imager, or a 2000-input/1300-output high-channel-count audio interface for neural decoding.  
- GPU compute-shader limitations were lamented: current drivers block low-level shader inspection, complicating a novel interpreter technique; AMD’s open ISA was suggested as an alternative to Nvidia’s closed stack.  
- Rust was noted to now compile and run on GPUs, potentially accelerating BCI and AI workloads in high-performance compute environments.