When American demographics becomes predominantly Mexican/Latin American cultures, what will happen to the United States as a whole? Will it become better as a result, stay the same or get worse?

It seems obvious that there has been a veiled push for [Hispanication] of this country for nearly 3 decades now. Uncontrolled and increased illegal immigration from south of the border is overshadowing all foreign cultures that helped make America great. Is there any socio-economic benefit to the Mexicanization of the U.S.A.? If so, who benefits and who loses?