It is more like
2001 - iPod
2007 - iPhone
IMHO the iMac, iTunes, and iPad were not truly innovative. They were incremental developments of existing products.
The issues Apple will face are
1. Staying ahead in areas where it is already ahead
2. Catching up fast enough in areas where it is behind
3. Jumping ahead by developing another true innovation.
These 3 things get harder to do as you grow market share and release more products. It is hard to stay on top forever. Many have tried and they have all failed so far