1. Tesla Roadster: 12 years 2. Google Glass: 9 years 3. Amazon Echo: 7 years 4. Oculus Rift: 7 years 5. Fitbit: 11 years 6. GoPro: 14 years 7. Apple Watch: 6 years 8. Snapchat Spectacles: 4 years 9. Nintendo Switch: 5 years 10. Segway: 20 year