|The one and only eternal Torah|
By the way, we have crossed that Era's threshold, because we now look forward to introduction of Shabbath early in the "Friday millennium", it currently being past "noon" of Year 5773.
Another such issue is the "New Torah" that will accompany that era. Here too the Gentile version of this concept is irrelevant (and perverted). Moshiach's "New Torah" is not a new one in the sense of new literature, G-d forbid, but rather, it will be a much deeper insight into that which we were already given. After all, Torah is infinite.
Said our sages, "that which we learned of it in this world (during the 6 millennia) is practically nil compared to what Moshiach will teach us from it." (Koheles Rabba 11:8)
This is why Lubavitch Rebbeim, when quoting Isaiah (51:4),
"... for Torah from Me shall emerge"
That's because in the Era of Redemption the world will assume further revelatory dimensions that heretofore could not be experienced or perceived; Then the world will be spiritually elevated for us to appreciate that which until then Nature had obscured. Nature will shed its veil and much more of Godliness will become visible to the refined flesh.