If Apple sold as many iPebbles in its first year as iPads in their first year

[deckeda]

from the article wrote:
Even a new product category would have to be wildly successful to have a meaningful impact on Apple's business.

This is why I don't understand investing. At all.

I've often read that a company that doesn't grow, dies. Really?

What if desktops (and therefore, Macs) completely disappeared and yet the company still thrived by keeping revenues/profits/whatever steady. No growth per se. Just a swap of products offered. Not success?