• A Royal Marines demonstration video of a jet-powered “Iron-Man” suit used for boarding operations was shared, illustrating near-term personal flight hardware.  
• Participants debated optoelectrowetting (light-controlled droplet motion) and concluded that a DLP projector shining through an LCD mask—similar to masked-SLA 3-D printing—offers the sharpest pixel definition for driving the effect.  
• Trade-offs between raster-scanning galvo lasers and full-frame LCD masking were discussed; galvos give speed but poor scalability to millions of pixels, while LCD-plus-lamp setups waste less power and provide parallel actuation.  
• The underlying mechanism described is “SCOEW” (Semiconductor-Coated Opto-Electrowetting): hydrogenated amorphous silicon on glass acts as a light-dependent resistor, locally modulating an applied electric field to change droplet wetting angles.  
• Practical optical considerations included using high-brightness mercury-arc or laser sources, Fresnel lenses for collimation, and cooling the LCD panel to prevent thermal damage.  
• Concerns were raised about droplet disturbance when fields are switched rapidly and about ghosting artifacts from row-wise resistance networks.  
• DIY precedents cited include Ben Krasnow’s and Thought Emporium’s YouTube videos on home-built electrode arrays for electrowetting and microfluidics.  
• A separate link to “3-D Printing Titanium” showed high-power galvo laser sintering in argon; participants suggested a vacuum chamber would simplify fume and gas management.