My opinion: iPhone!
- Every year there are more people in the world. More people need more phones.
- Phone is an addiction as well as a consumable. It goes through wear and tear and no matter what, people keep changing and refreshing.
- It does great things, saves a lot of time and it is nearly impossible to get rid of it unless and until some other path breaking technology comes into picture. (This can happen in 10 to 20 years)
- It is usually priced at several times the bill of material.
- It made apple really successful in 10 years.
Stay blessed and stay inspired!