Eventually — perhaps a generation from now, perhaps two, but not much longer than that — there will be a statue honoring Kate Kelly in Salt Lake City. People there will find it confusing. Either it will confuse them because the Church of Jesus Christ of Latter-day Saints will have become more inclusive, and so the idea of excommunicating an advocate for women’s ordination will seem strange, or else because the LDS won’t have become more inclusive, and thus most people seeing the statue will have a hard time remembering what a Mormon was.
The last time this happened, with black men being ordained to the priesthood in 1978, institutional Mormonism (separate and distinct from the personal faith of a number of Mormons) was able to basically sweep it all under the carpet. You can bet the black community remembered, but they're so underrepresented within the LDS church's membership that I could have Sunday School teachers give me racist explanations for the ban without anyone challenging them.
This is going to affect roughly half their membership. Even if they make it an optional thing, that women don't get until they turn 19* or go on missions or something, it's still going to be huge. I don't know what effect the Internet will have on it, since a lot of Mormons self-censor their web usage, but there are a lot more who are informed about their history and feminist issues this time around than there were during the Equal Rights Amendment battle.
A lot of them are going to become tomorrow's leaders. The only question is whether this will happen inside of or outside the LDS church.
* Mormon boys (meaning young Mormons assigned male, since they don't "get" gender identity) are ordained to the priesthood at age 12, if they pass a "worthiness interview" which requires them to discuss their sex life with a middle-aged man one-on-one behind closed doors. They repeat these interviews at least every two years, until they are ordained an "Elder" at age 18. If they confess to masturbating, it is often (usually?) seen as a reason to deny their ordination to the next office of the priesthood, which amounts to public shaming and causes a great deal of "concern" for them.
This is how Mormon boys learn to lie.