Laura Petrolino wrote:

The Apple marketing arm is genius in many ways, so it’s unsurprising they offer a great case study of the marketing halo effect.

In 2005, Apple focused a good chunk of their marketing budget behind the iPod.

...

Why the iPod?

Why not focus on bigger revenue drivers such as personal computers, software, and services?

...

By anchoring it’s marketing through the popular and market dominate iPod, people clearly saw Apple as a technology leader, innovator, and the best, most forward thinking choice.

This perspective spilled over to all Apple products.