[dragonwriter]

The "dual-purpose" nature of the H-1B basically means that (1) you are not prohibited to enter on an H-1B with the intent to stay permanently, and, perhaps more significantly (2) you aren't required to leave the US for a period of time after entering on an H-1B before getting an immigrant visa which will let you stay permanently.

But it is still a non-immigrant visa that does not lead to permanent residency or citizenship, but requires you to qualify for, apply for, and secure an immigrant visa if and when you want to become an immigrant rather than a non-immigrant worker.