I don't think that was a "I am rich" chuckle so much as "I'm overlooking a fundamental market shift that's about to happen" chuckle.
At the time, most cellphones weren't smartphones at all, and those that were were basically a niche enterprise segment*. He didn't anticipate that smartphones were about to become so good that "feature phones" and other low-end cellphones would largely disappear from the market.
*) Which largely ran Blackberry, PalmOS, Symbian, or Windows Mobile. All of those basically disappeared within half a decade. A very unusual shift.