Immigration isn't an infinite source of people because birth rates in Latin America, like in most of the world, have dropped toward replacement level and perhaps lower. I'd say the answer is no, but more importantly, that the concept of Latinos as a distinct minority separate from Anglos by a shining line will fade within a decent amount of time. It already has for many people.
yeah I tend to agree here. Latino identity will lose most of its current meaning in another 2 or 3 generations: Jews and Italians weren't considered white 100 years ago, and Irish weren't considered white 150 years ago.