1. Does 3D printing change America's gun control debate?

2. This medical pioneer trains digital doctors with AR and VR

3. Augmented Reality is coming to a restaurant near you

4. This robotic arm for multitasking can be controlled with thoughts

1. Surface Go: Small, light, and the best cheap PC ever

2. Red's holographic Hydrogen One phone just took a big step closer

3. Face it: Windows PCs are now just better -- and cooler -- than Macs

4. Extreme Nest: Taking your smart thermostat to the next level