A few come to mind:
1. Light weight engines. (with easy diagnosis of ignition problems)
2. Extraplanetary habitats/greenhouses.
3 Hail resistant skylights.
4. Fiberoptics?
5. NOT multilevel floors (for obvious reasons.)
Isuzu was doing research on ceramic engine technology maybe 20 yrs ago. Too bad it never came to fruition. Supposedly would require no water cooling and therefore a lot more efficient. The little internet research i did says there are problems with the components cracking due to the extremes of heating and cooling.