Kate Kelly could have attended in her area, and maybe she did. I hope so.
I’m sure that within 5-10 years, women attending PH GC sessions will become accepted and no big deal. I don’t see that changing anything else much as far as women in the church are concerned. There will always be a line in the sand. I believe it will be many decades, if ever, before women will hold the priesthood in the church. This will be just one of many challenges the church will face in the future, though. I think a lot of the talks this GC were a sign that the brethren are aware of that. But like lifting the priesthood ban, it may too little too late for too many.