We also know that, by the mid-70s, the Nimoy Spock had 80 episodes worth of development in the original TV series, plus the additional 22 episodes of the animated series. That's not to mention the exposure the character got via posters and promotional items, promotional appearances, the Blish collections, audio recordings, and so forth. Even the "Ballad of Bilbo Baggins" video: Nimoy appeared ostensibly as himself, but no effort was made to disguise the distinctive Spock haircut.
Compared to all of that, the Quinto Spock appears in about four hours' worth of content, plus one video game and one novelization of the 2009 movie.
Now I suppose it's within the realm of possibility that, someday, NuSpock might be remembered as well and as fondly as oldSpock—it's a stretch, but ask yourself how many people think of George Reeves as Superman, versus how many people would think first of Christopher Reeve—however, I don't think it's terribly likely.
It's likely to be a very long time before any answer to the question posed in the thread title has a chance of meaning very much. Honestly, I'm wondering why it seemed important to be asking it now.