1. lots of innovation in ICE engines is getting close to production. Cleaner, more efficient etc. This is important even while the industry is moving to EVs.

2. Bambu Labs leapfrogged prosumer 3D printing by 5-10 years. Their printers are becoming the de-facto standard. This will enable all sorts of startups for the next decade.

3. Most iPhones now have a 3D scanner + AI-aided software to accurately scan your body and generate designs is becoming more mature. See also 2.

4. material sciences both new discoveries and new applications for 50 years old discoveries